Sproule, J. M. (1991). Speechmaking: An introduction to rhetorical competence. Wm. C. Brown.
Citazione stile Chigago Style (17a edizione)Sproule, J. Michael. Speechmaking: An Introduction to Rhetorical Competence. Dubuque: Wm. C. Brown, 1991.
Citatione MLA (9a ed.)Sproule, J. Michael. Speechmaking: An Introduction to Rhetorical Competence. Wm. C. Brown, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.