Gerard, J. (1889). Science and Scientists: Some Papers on Natural History: No. IV. "Behold the Birds of the Air.". London.
Cita Chicago Style (17a ed.)Gerard, John. Science and Scientists: Some Papers on Natural History: No. IV. "Behold the Birds of the Air.". London, 1889.
Cita MLA (8a ed.)Gerard, John. Science and Scientists: Some Papers on Natural History: No. IV. "Behold the Birds of the Air.". London, 1889.
Precaución: Estas citas no son 100% exactas.