APA-viite

Cowles Education Corporation. (1968). Cowles encyclopedia of nations. Cowles Education Corp.

Chicago-tyylinen lähdeviittaus

Cowles Education Corporation. Cowles Encyclopedia of Nations. [New York]: Cowles Education Corp, 1968.

MLA-viite

Cowles Education Corporation. Cowles Encyclopedia of Nations. Cowles Education Corp, 1968.