Nelson, P. E. (2011). I speak: Public speaking for contemporary life (2011 ed. (5th ed.).). McGraw-Hill Higher Education.
Citace podle Chicago (17th ed.)Nelson, Paul E. I Speak: Public Speaking for Contemporary Life. 2011 ed. (5th ed.). New York: McGraw-Hill Higher Education, 2011.
Citace podle MLA (9th ed.)Nelson, Paul E. I Speak: Public Speaking for Contemporary Life. 2011 ed. (5th ed.). McGraw-Hill Higher Education, 2011.
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