Gregory, H. (1999). Public speaking for college and career (5th.ed.). McGraw-Hill.
Cita Chicago (17th ed.)Gregory, Hamilton. Public Speaking for College and Career. 5th.ed. Boston: McGraw-Hill, 1999.
Cita MLA (9th ed.)Gregory, Hamilton. Public Speaking for College and Career. 5th.ed. McGraw-Hill, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.