APA (7th ed.) Zitazioa

Ace Com. (1992). Agenda 21: Enviroment. Ace Communication.

Chicago Style (17th ed.) Zitazioa

Ace Com. Agenda 21: Enviroment. Nairobi, kenya: Ace Communication, 1992.

MLA (9th ed.) Zitazioa

Ace Com. Agenda 21: Enviroment. Ace Communication, 1992.