Cita APA (7th ed.)

ebrary, Inc, & Key, M. R. (1980). The relationship of verbal and nonverbal communication. Mouton.

Cita Chicago (17th ed.)

ebrary, Inc, i Mary Ritchie Key. The Relationship of Verbal and Nonverbal Communication. The Hague ; New York: Mouton, 1980.

Cita MLA (9th ed.)

ebrary, Inc, i Mary Ritchie Key. The Relationship of Verbal and Nonverbal Communication. Mouton, 1980.