APA (7th ed.) Citation

Metcalf, M. M., & Bell, M. M. (1918). The Salpidae: A taxonomic study. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Metcalf, Maynard Mayo, and Mary M. Bell. The Salpidae: A Taxonomic Study. Washington: Govt. Print. Off, 1918.

MLA (9th ed.) Citation

Metcalf, Maynard Mayo, and Mary M. Bell. The Salpidae: A Taxonomic Study. Govt. Print. Off, 1918.