APA (7th ed.) Citation

Smithsonian Institution. (1936). Five new genera and two new species of unstalked crinoids. [s.n.].

Chicago Style (17th ed.) Citation

Smithsonian Institution. Five New Genera and Two New Species of Unstalked Crinoids. [Washington]: [s.n.], 1936.

MLA (9th ed.) Citation

Smithsonian Institution. Five New Genera and Two New Species of Unstalked Crinoids. [s.n.], 1936.