APA (7th ed.) Citation

Sclater, P. L., & Hudson, W. H. (2012). Argentine Ornithology, Volume II (of 2) A descriptive catalogue of the birds of the Argentine Republic. Project Gutenberg.

Chicago Style (17th ed.) Citation

Sclater, P. L., and W. H. Hudson. Argentine Ornithology, Volume II (of 2) A Descriptive Catalogue of the Birds of the Argentine Republic. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Sclater, P. L., and W. H. Hudson. Argentine Ornithology, Volume II (of 2) A Descriptive Catalogue of the Birds of the Argentine Republic. Project Gutenberg, 2012.

Warning: These citations may not always be 100% accurate.