Hochtief
Catatan dan referensi

↑  "HOCHTIEF Konzern > Geschichte". www.hochtief.de.
↑  Annual Report 2017, 21 February 2018, retrieved 6 May 2018.
1 2 3 4 5  "Annual Report 2010". Hochtief. Diarsipkan dari versi asli tanggal 2011-05-28. Diakses tanggal 10 April 2010.
↑  4-traders. "ACS Actividades de Construccion y Servicios company : Shareholders, managers and business summary - Bolsa de Madrid: ACS - 4-Traders". www.4-traders.com. Diarsipkan dari versi asli tanggal 2018-06-19. Diakses tanggal 2020-05-01.
1 2  Hochtief investor relations website. Retrieved 16 February 2006
↑  Corporate Portrait Diarsipkan 27 September 2007 di Wayback Machine., Hochtief website. Retrieved 16 February 2006
↑   Diarsipkan 22 March 2012 di Wayback Machine., Hochtief annual report website. Retrieved 5 April 2010
↑  The rescue of Abu Simbel, 1963-1968, Hochtief website. Retrieved 16 February 2006
↑  System leadership and the public-private partnership from 1990 onwards, Page 2/5, Hochtief history website. Retrieved 16 February 2006
↑  From the master-builder to the construction corporation (1966-1989), Page 2/3, Hochtief history website. Retrieved 16 February 2006
↑  Sponsoring: Close links with the Bauhaus, Hochtief website. Retrieved 16 February 2006
1 2  Zollverein coal mine in Essen, 1929-1931, Hochtief history website. Retrieved 16 February 2006; further information Diarsipkan 27 December 2005 di Wayback Machine. on http://www.worldheritagesite.org/ accessed 16 February 2006
↑  The Kadinsky-Klee House, Hochtief website. Retrieved 16 February 2005; Restoration, Hochtief website. Retrieved 16 February 2006; Bauhaus and its sites Diarsipkan 30 August 2006 di Wayback Machine., http://www.worldheritagesite.org/. Retrieved 16 February 2006
1 2 3  Politicization of the construction industry (1933-1945), Page 4/4, Hochtief history website. Retrieved 16 February 2006
1 2  Politicization of the construction industry (1933-1945), Page 3/4, Hochtief history website. Retrieved 16 February 2006
↑  Bosphorus Bridge in Turkey, 1970-1974, Hochtief history website. Retrieved 16 February 2006
↑  From the master-builder to the construction corporation (1966-1989), Page 3/3, Hochtief history website. Retrieved 16 February 2006
↑  Exhibition center tower in Frankfurt am Main, 1988-1991, Hochtief history website. Retrieved 16 February 2005; Hochtief di basis data Structurae
↑  Commerzbank in Frankfurt am Main, 1994-1996, Hochtief website. Retrieved 16 February 2006; Hochtief di basis data Structurae
↑  Bafin press release Diarsipkan 28 September 2011 di Wayback Machine., Bafin website. Retrieved 5 April 2011
↑  , Deutsche Welle
↑  The Helfmann Brothers (1873-1896), Page 1/5, Hochtief history website. Retrieved 16 February 2006
↑  The Helfmann Brothers (1873-1896), Page 2/5, Hochtief history website. Retrieved 16 February 2006
↑  The Helfmann Brothers (1873-1896), Page 4/5, Hochtief history website. Retrieved 16 February 2006
↑  The Helfmann Brothers (1873-1896), Page 5/5, Hochtief history website. Retrieved 16 February 2006
↑  Establishment of the "Aktiengesellschaft", (1896-1921), Page 1/5, Hochtief history website. Retrieved 16 February 2006
↑  Establishment of the "Aktiengesellschaft", (1896-1921), Page 2/5, Hochtief history website. Retrieved 16 February 2006
↑  Grain store in the port of Genua, 1899-1901, Hochtief history website]. Retrieved 16 February 2006
↑  Establishment of the "Aktiengesellschaft", (1896-1921), Page 5/5, Hochtief history website. Retrieved 16 February 2006
↑  Under the influence of the Stinnes Group, (1921-1933), Page 1/6, Hochtief history website. Retrieved 16 February 2006
↑  Under the influence of the Stinnes Group, (1921-1933), Page 2/6, Hochtief history website. Retrieved 16 February 2006; Time magazine claim appears uncited in Hugo Stinnes article
↑  Under the influence of the Stinnes Group, (1921-1933), Page 3/6, Hochtief history website. Retrieved 16 February 2006
↑  Under the influence of the Stinnes Group, (1921-1933), Page 4/6, Hochtief history website. Retrieved 16 February 2006
↑  The Echelsbach Bridge, Hochtief history website. Retrieved 16 February 2006; Hochtief di basis data Structurae. Retrieved 16 February 2006
↑  Under the influence of the Stinnes Group, (1921-1933), Page 5/6, Hochtief history website. Retrieved 16 February 2006
↑  Under the influence of the Stinnes Group, (1921-1933), Page 6/6, Hochtief history website. Retrieved 16 February 2006
↑  Albert Canal in Belgium, 1930-1934, Hochtief history website. Retrieved 16 February 2006
↑  Belle Millo, ed. (2010). Voices of Winnipeg Holocaust Survivors. Belle Millo. hlm. 166. ISBN 978-0-9691256-9-3.
↑  Daftar pusat yang lepas, dan penunjukkan Konrad, berasal dari Reconstruction (1945-1966), Page 1/3, Hochtief history website. Diakses tanggal 16 Februari 2006