Gaya APA

Nelson, P, E. (2009). I speak L public speaking for contemporary life / Paul E. Nelson, Scott Titsworth, Judy C. Pearson . Boston: McGraw Hill Higher Education.

Gaya MLA

Nelson, Paul, E.. "I speak L public speaking for contemporary life / Paul E. Nelson, Scott Titsworth, Judy C. Pearson". Boston: McGraw Hill Higher Education, 2009. Text.