APA (7th ed.) Citation

Geological Survey (U.S.). (1937). Flora of New Albany Shale: Part 2, Calamopityeae and their relationships. [s.n.].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Flora of New Albany Shale: Part 2, Calamopityeae and Their Relationships. [Washington]: [s.n.], 1937.

MLA (9th ed.) Citation

Geological Survey (U.S.). Flora of New Albany Shale: Part 2, Calamopityeae and Their Relationships. [s.n.], 1937.