Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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