APA (7th ed.) Citation

Mortensen, T. (1920). Studies in the development of crinoids. Carnegie institution of Washington.

Chicago Style (17th ed.) Citation

Mortensen, Th. Studies in the Development of Crinoids. Washington: Carnegie institution of Washington, 1920.

MLA (9th ed.) Citation

Mortensen, Th. Studies in the Development of Crinoids. Carnegie institution of Washington, 1920.

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