Gregory, H. (2010). Public speaking for college and career (9th ed.). Boston: McGraw-Hill Higher Education.
Chicago-tyylinen lähdeviittausGregory, Hamilton. Public Speaking for College and Career. 9th ed. Boston: McGraw-Hill Higher Education, 2010.
MLA-viiteGregory, Hamilton. Public Speaking for College and Career. 9th ed. Boston: McGraw-Hill Higher Education, 2010.
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