APA (7th ed.) Citation

Gerlach, F. M. (1917). Vocabulary studies. [s.n.].

Chicago Style (17th ed.) Citation

Gerlach, Frederick Matthew. Vocabulary Studies. Colorado Springs, Colo: [s.n.], 1917.

MLA (9th ed.) Citation

Gerlach, Frederick Matthew. Vocabulary Studies. [s.n.], 1917.