Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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