APA (7th ed.) Citation

United States National Museum. (1943). The Nearctic Species of Parasitic Flies Belonging to Zenillia and Allied Genera. [s.n.].

Chicago Style (17th ed.) Citation

United States National Museum. The Nearctic Species of Parasitic Flies Belonging to Zenillia and Allied Genera. [Washington]: [s.n.], 1943.

MLA (9th ed.) Citation

United States National Museum. The Nearctic Species of Parasitic Flies Belonging to Zenillia and Allied Genera. [s.n.], 1943.