APA (7th ed.) Citation

Smithsonian Institution. (1921). Monograph of existing crinoids: Volume 1. Comatulids, Part 2. GPO.

Chicago Style (17th ed.) Citation

Smithsonian Institution. Monograph of Existing Crinoids: Volume 1. Comatulids, Part 2. [Washington]: GPO, 1921.

MLA (9th ed.) Citation

Smithsonian Institution. Monograph of Existing Crinoids: Volume 1. Comatulids, Part 2. GPO, 1921.

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