MLA

Bruhn, Martha E. Conversational Efficiency : a Set of One Hundred Exercises Offering a New Approach to Skill In Reading the Lips and Participating In a General Conversation. Washington: Volta Bureau, 1956.

APA

Bruhn, M. E. (1956). Conversational efficiency : a set of one hundred exercises offering a new approach to skill in reading the lips and participating in a General Conversation. Washington: Volta Bureau.

Chicago

Bruhn, Martha E., Conversational Efficiency: A Set of One Hundred Exercises Offering a New Approach to Skill In Reading the Lips and Participating In a General Conversation. Washington: Volta Bureau, 1956.