Coba jelasin Rujukan dari Formasi Arang dalam bahasa melayu dong

Abd. Rahim Harun and Ho C.S., 2001. Gravity survey to delineate the Tertiary Basins in North Kedah and Perlis. Minerals and Geoscience Department Malaysia. Report No. GF 08/01. (Unpublished)

Aw, P.C., 1982. Coal investigation within the Tertiary sediments in Chuping , Perlis, adjacent to the Thai-Malaysian border. Report Geological Survey Malaysia. (Unpublished)

Jones, C.R., 1981. Geology and mineral resources of the Perlis, North Kedah and the Langkawi Islands. Geological Survey Department West Malaysia Memoir, 17, 257p.

Scrivenor, J.B., 1913. Economic Geology of Perlis. Unpublished report for Perlis Government.

The Malaysia-Thailand Border Joint Geological Survey Committee (MT-JGSC), 2009. Geology of the Bukit Batu Putih - Satun transect area along the Malaysia - Thailand border. Minerals and Geoscience Department Malaysia.

Vijayan, V.R., 1990. Gravity survey of the Layang-layang Tertiary Basin in Johor, Peninsular Malaysia – A preliminary report. Bulletin Geological Society Malaysia, 26, 55-70.