Franklin

MLA

Liddell, Mark Harvey. The Physical Characteristics of Speech Sound. Lafayette, Ind.: Purdue University, 1924.

APA

Liddell, M. Harvey. (1924). The physical characteristics of speech sound. Lafayette, Ind.: Purdue University.

Chicago

Liddell, Mark Harvey, The Physical Characteristics of Speech Sound. Lafayette, Ind.: Purdue University, 1924.