APA (7th ed.) Zitazioa

Castillo, A. d. (1930). Enciclopedia Columbus (5a. ed.). The University Society, Inc.

Chicago Style (17th ed.) Zitazioa

Castillo, Alberto del. Enciclopedia Columbus. 5a. ed. Nueva York: The University Society, Inc, 1930.

MLA (9th ed.) Zitazioa

Castillo, Alberto del. Enciclopedia Columbus. 5a. ed. The University Society, Inc, 1930.