APA (7th ed.) Citation

Denver Museum of Natural History. (1936). Popular series (Denver Museum of Natural History). [publisher not identified].

Chicago Style (17th ed.) Citation

Denver Museum of Natural History. Popular Series (Denver Museum of Natural History). Denver: [publisher not identified], 1936.

MLA (9th ed.) Citation

Denver Museum of Natural History. Popular Series (Denver Museum of Natural History). [publisher not identified], 1936.

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