Citazione APA

Gerard, J. (1889). Science and Scientists: Some Papers on Natural History: No. IV. "Behold the Birds of the Air.". London.

Stile di citazione Chicago

Gerard, John. Science and Scientists: Some Papers on Natural History: No. IV. "Behold the Birds of the Air.". London, 1889.

Citazione MLA

Gerard, John. Science and Scientists: Some Papers on Natural History: No. IV. "Behold the Birds of the Air.". London, 1889.