APA (7th ed.) Zitazioa
Preston, C. J., & Ouderkirk, W. (2007). Nature, Value, Duty: Life on Earth with Holmes Rolston, III. Springer Netherlands. https://doi.org/10.1007/1-4020-4878-5
Chicago Style (17th ed.) Zitazioa
Preston, Christopher J., eta Wayne Ouderkirk. Nature, Value, Duty: Life on Earth with Holmes Rolston, III. Dordrecht: Springer Netherlands, 2007. https://doi.org/10.1007/1-4020-4878-5.
MLA (9th ed.) Zitazioa
Preston, Christopher J., eta Wayne Ouderkirk. Nature, Value, Duty: Life on Earth with Holmes Rolston, III. Springer Netherlands, 2007. https://doi.org/10.1007/1-4020-4878-5.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.