Cita APA (7th ed.)

Frey, L. R. (1991). Investigating communication: An introduction to research methods. Prentice Hall.

Cita Chicago (17th ed.)

Frey, Lawrence R. Investigating Communication: An Introduction to Research Methods. Englewood Cliffs, N.J: Prentice Hall, 1991.

Cita MLA (9th ed.)

Frey, Lawrence R. Investigating Communication: An Introduction to Research Methods. Prentice Hall, 1991.