Gerard, J. (1889). Science and Scientists: Some Papers on Natural History: No. IV. "Behold the Birds of the Air.". London.
Chicago (17e ed.) BronvermeldingGerard, John. Science and Scientists: Some Papers on Natural History: No. IV. "Behold the Birds of the Air.". London, 1889.
MLA (8e ed.) BronvermeldingGerard, John. Science and Scientists: Some Papers on Natural History: No. IV. "Behold the Birds of the Air.". London, 1889.
Let op: Deze citaties zijn niet altijd 100% accuraat.