APA (7th ed.) Citation

United States National Museum. (1904). American hydroids, Part II: Sertularidae. GPO.

Chicago Style (17th ed.) Citation

United States National Museum. American Hydroids, Part II: Sertularidae. [Washington]: GPO, 1904.

MLA (9th ed.) Citation

United States National Museum. American Hydroids, Part II: Sertularidae. GPO, 1904.

Warning: These citations may not always be 100% accurate.