Johnson, G. B. (2000). The living world (2nd ed.). McGraw-Hill.
Chicago Style aipamenaJohnson, George B. The Living World. 2nd ed. Boston: McGraw-Hill, 2000.
MLA aipamenaJohnson, George B. The Living World. 2nd ed. McGraw-Hill, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.