APA引文

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

Chicago Edition Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.