Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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