APA aipamena

(2005). The Environment encyclopedia and directory 2005 (4th ed.). Routledge.

Chicago Style aipamena

The Environment Encyclopedia and Directory 2005. 4th ed. London: Routledge, 2005.

MLA aipamena

The Environment Encyclopedia and Directory 2005. 4th ed. Routledge, 2005.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.