APA (7th ed.) Zitazioa
Guthery, F. S. (2008). A primer on natural resource science. Texas A&M University Press.
Chicago Style (17th ed.) Zitazioa
Guthery, Fred S. A Primer on Natural Resource Science. College Station: Texas A&M University Press, 2008.
MLA (9th ed.) Zitazioa
Guthery, Fred S. A Primer on Natural Resource Science. Texas A&M University Press, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.