Camrbell. (1964). The oxford book of birds (4th ed.). Oxford University Press.
Chicago Edition CitationCamrbell. The Oxford Book of Birds. 4th ed. Oxford University Press, 1964.
MLA Edition CitationCamrbell. The Oxford Book of Birds. 4th ed. Oxford University Press, 1964.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.