APA (7th ed.) Citation

Geological Survey (U.S.). (1939). A Monograph of foraminiferal family Nonionidae. [s.n.].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). A Monograph of Foraminiferal Family Nonionidae. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

Geological Survey (U.S.). A Monograph of Foraminiferal Family Nonionidae. [s.n.], 1939.