APA (7th ed.) Zitazioa

Post. Exploring Nature in Illinois. University of Illinois Press.

Chicago Style (17th ed.) Zitazioa

Post. Exploring Nature in Illinois. University of Illinois Press.

MLA (9th ed.) Zitazioa

Post. Exploring Nature in Illinois. University of Illinois Press.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.