APA aipamena

P McDonald & R A Edwards. (1990). Animal nutrition (4.). England.

Chicago Style aipamena

P McDonald and R A Edwards. Animal Nutrition. 4. England, 1990.

MLA aipamena

P McDonald and R A Edwards. Animal Nutrition. 4. England, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.