Cita APA (7th ed.)

Griffin, C. L. (2015). Invitation to public speaking (5e.). Cengage Learning.

Cita Chicago (17th ed.)

Griffin, Cindy L. Invitation to Public Speaking. 5e. Stamford, [Connecticut]: Cengage Learning, 2015.

Cita MLA (9th ed.)

Griffin, Cindy L. Invitation to Public Speaking. 5e. Cengage Learning, 2015.