Cita APA (7a ed.)

Ehninger, D. (1982). Principles and types of speech communication (9th ed.). Scott, Foresman and Co.

Cita Chicago Style (17a ed.)

Ehninger, Douglas. Principles and Types of Speech Communication. 9th ed. Glenview, Ill: Scott, Foresman and Co, 1982.

Cita MLA (9a ed.)

Ehninger, Douglas. Principles and Types of Speech Communication. 9th ed. Scott, Foresman and Co, 1982.