APA aipamena

Freeland Peter. (1991). Focus on biology: Habitats and the environment. London: Hodder and Stoughton.

Chicago Style aipamena

Freeland Peter. Focus On Biology: Habitats and the Environment. London: Hodder and Stoughton, 1991.

MLA aipamena

Freeland Peter. Focus On Biology: Habitats and the Environment. London: Hodder and Stoughton, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.