トラック・システム
— The truck system.”, A Treatise on the Law of Contracts by Charles Greenstreet Addison, I, Jersey City: Frederick D. Linn & Co., pp. 434–36, https://books.google.com/books?id=fjI9AAAAIAAJ
Ruegg, Alfred Henry (1901), “Changes in the Law of England Affecting Labour (The Truck System)”, A Century of Law Reform, London: MacMillan and Co, pp. 254–257, https://books.google.com/books?id=j1czAAAAIAAJ 2008年5月31日閲覧。
Commissioners appointed to Inquire into the Truck System, ed. (1871), Truck; or, Semi-Serfdom in the Shetland (Zetland) Isles (2nd ed.), London: Elliot Stock, https://books.