APA (7th ed.) Zitazioa

Hargreaves, D., & Hargreaves, B. (1972). African trees. Hargreaves Co..

Chicago Style (17th ed.) Zitazioa

Hargreaves, Dorothy, eta Bob Hargreaves. African Trees. Hawai: Hargreaves Co., 1972.

MLA (9th ed.) Zitazioa

Hargreaves, Dorothy, eta Bob Hargreaves. African Trees. Hargreaves Co., 1972.