Griffin, C. L. (2018). Invitation to public speaking (Sixth edition.). Cengage Learning.
Chicago-viite (17. p.)Griffin, Cindy L. Invitation to Public Speaking. Sixth edition. Boston, MA: Cengage Learning, 2018.
MLA-viite (9. p.)Griffin, Cindy L. Invitation to Public Speaking. Sixth edition. Cengage Learning, 2018.
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