APA-referens (7:e uppl.)

Harewood, J. (1975). The population of Trinidad and Tobago. s.n.].

Chicago-referens (17:e uppl.)

Harewood, Jack. The Population of Trinidad and Tobago. [Paris: s.n.], 1975.

MLA-referens (9:e uppl.)

Harewood, Jack. The Population of Trinidad and Tobago. s.n.], 1975.