APA (7th ed.) Zitazioa
Purves, W. K., Heller, H. C., & Orians, G. H. (1992). Life, the science of biology (3rd ed.). Sinauer Associates ; W.H. Freeman.
Chicago Style (17th ed.) Zitazioa
Purves, William K., H. Craig Heller, eta Gordon H. Orians. Life, the Science of Biology. 3rd ed. Sunderland, Mass. : Salt Lake City, Utah: Sinauer Associates ; W.H. Freeman, 1992.
MLA (9th ed.) Zitazioa
Purves, William K., et al. Life, the Science of Biology. 3rd ed. Sinauer Associates ; W.H. Freeman, 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.