APA (7th ed.) Zitazioa

Anderson, R. C. (1991). Cicles of influence. Moody.

Chicago Style (17th ed.) Zitazioa

Anderson, Robert C. Cicles of Influence. Chicago: Moody, 1991.

MLA (9th ed.) Zitazioa

Anderson, Robert C. Cicles of Influence. Moody, 1991.