APA (7th ed.) Citation

Hansman, R. H., & Nitecki, M. H. (1979). Type Graptolithina in Field Museum of Natural History. Field Museum of Natural History.

Chicago Style (17th ed.) Citation

Hansman, Robert H., and Matthew H. Nitecki. Type Graptolithina in Field Museum of Natural History. [Chicago]: Field Museum of Natural History, 1979.

MLA (9th ed.) Citation

Hansman, Robert H., and Matthew H. Nitecki. Type Graptolithina in Field Museum of Natural History. Field Museum of Natural History, 1979.