APA-referens (7:e uppl.)

Choe, B. (1985). The outlook for thermal coal. World Bank.

Chicago-referens (17:e uppl.)

Choe, Boum-Jong. The Outlook for Thermal Coal. Washington: World Bank, 1985.

MLA-referens (9:e uppl.)

Choe, Boum-Jong. The Outlook for Thermal Coal. World Bank, 1985.