Frey, L. R., Botan, C. H., & Kreps, G. L. (2000). Investigating communication: An introduction to research methods (2nd ed.). Allyn and Bacon.
Cita Chicago (17th ed.)Frey, Lawrence R., Carl H. Botan, i Gary L. Kreps. Investigating Communication: An Introduction to Research Methods. 2nd ed. Boston: Allyn and Bacon, 2000.
Cita MLA (9th ed.)Frey, Lawrence R., et al. Investigating Communication: An Introduction to Research Methods. 2nd ed. Allyn and Bacon, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.