George W Cox. (1979). Agricultural ecology. San Francisco: W.H.Freeman and Company.
Chicago Style aipamenaGeorge W Cox. Agricultural Ecology. San Francisco: W.H.Freeman and Company, 1979.
MLA aipamenaGeorge W Cox. Agricultural Ecology. San Francisco: W.H.Freeman and Company, 1979.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.