APA-referens (7:e uppl.)

Maboganja, A. (1997). The State of the earth: Contemporary. Block Well.

Chicago-referens (17:e uppl.)

Maboganja, Akin. The State of the Earth: Contemporary. New York: Block Well, 1997.

MLA-referens (9:e uppl.)

Maboganja, Akin. The State of the Earth: Contemporary. Block Well, 1997.