Helmayr, C. E. (1948). Catalogue of birds of the Americas and the adjacent Islands in the field museum of natural history. Field museum of Natural History.
Chicago Style (17th ed.) CitationHelmayr, Charles E. Catalogue of Birds of the Americas and the Adjacent Islands in the Field Museum of Natural History. United States of America: Field museum of Natural History, 1948.
MLA (9th ed.) CitationHelmayr, Charles E. Catalogue of Birds of the Americas and the Adjacent Islands in the Field Museum of Natural History. Field museum of Natural History, 1948.
Warning: These citations may not always be 100% accurate.