APA (7th ed.) Zitazioa
Helicon (Firm) & ebrary, Inc. (2006). Hutchinson trends in science. Helicon.
Chicago Style (17th ed.) Zitazioa
Helicon (Firm) eta Inc ebrary. Hutchinson Trends in Science. Abingdon, Oxon: Helicon, 2006.
MLA (9th ed.) Zitazioa
Helicon (Firm) eta Inc ebrary. Hutchinson Trends in Science. Helicon, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.