Cita APA (7th ed.)

Ehninger, D. (1978). Principles and types of speech communication (8th ed.). Schott foresman.

Cita Chicago (17th ed.)

Ehninger, Douglas. Principles and Types of Speech Communication. 8th ed. London: Schott foresman, 1978.

Cita MLA (9th ed.)

Ehninger, Douglas. Principles and Types of Speech Communication. 8th ed. Schott foresman, 1978.