Sproule, J. M. (1997). Speechmaking: Rhetorical competence in a postmodern world (2nd ed.). Brown & Benchmark Publishers.
Cita Chicago (17th ed.)Sproule, J. Michael. Speechmaking: Rhetorical Competence in a Postmodern World. 2nd ed. Madison, WI: Brown & Benchmark Publishers, 1997.
Cita MLA (8th ed.)Sproule, J. Michael. Speechmaking: Rhetorical Competence in a Postmodern World. 2nd ed. Brown & Benchmark Publishers, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.