Gaya APA

Alyea, H, . (1956). Collier's Encyclopedia 15 (Ed. 15). New York: P. F. Collier & Son Cosporation,.

Gaya MLA

Alyea, Hubert, . "Collier's Encyclopedia 15". Ed. 15 New York: P. F. Collier & Son Cosporation,, 1956. Buku Pend. Sejarah.