Gerard, J. (1889). Science and Scientists: Some Papers on Natural History: No. IV. "Behold the Birds of the Air.". London.
Citação norma ChicagoGerard, John. Science and Scientists: Some Papers on Natural History: No. IV. "Behold the Birds of the Air.". London, 1889.
Citação norma MLAGerard, John. Science and Scientists: Some Papers on Natural History: No. IV. "Behold the Birds of the Air.". London, 1889.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.