Cita APA (7th ed.)
Walter M Otis. (1976). Speaking intelligently: Communication for problem solving. Macmillan.
Cita Chicago (17th ed.)
Walter M Otis. Speaking Intelligently: Communication for Problem Solving. New York: Macmillan, 1976.
Cita MLA (9th ed.)
Walter M Otis. Speaking Intelligently: Communication for Problem Solving. Macmillan, 1976.
Atenció: Aquestes cites poden no estar 100% correctes.