APA (7th ed.) Citation

Watt, A. D. (1970). Catalog of the illustrated Paleozoic plant specimens in the National Museum of Natural History. Smithsonian Institution Press.

Chicago Style (17th ed.) Citation

Watt, Arthur Dwight. Catalog of the Illustrated Paleozoic Plant Specimens in the National Museum of Natural History. Washington: Smithsonian Institution Press, 1970.

MLA (9th ed.) Citation

Watt, Arthur Dwight. Catalog of the Illustrated Paleozoic Plant Specimens in the National Museum of Natural History. Smithsonian Institution Press, 1970.