Gaya APA

Alyea, H. (1956). Collier's Encyclopedia 18 (Ed. 18). New York: P. F. Collier & Son Cosporation.

Gaya MLA

Alyea, Hubert. "Collier's Encyclopedia 18". Ed. 18 New York: P. F. Collier & Son Cosporation, 1956. Buku Pend. Sejarah.