APA (7th ed.) Citation

Dahl, L. A. (1949). Public school audiometry: Principles and methods. [The Interstate].

Chicago Style (17th ed.) Citation

Dahl, Loraine Anson. Public School Audiometry: Principles and Methods. [Danville, Ill.]: [The Interstate], 1949.

MLA (8th ed.) Citation

Dahl, Loraine Anson. Public School Audiometry: Principles and Methods. [The Interstate], 1949.