Booher, Diana
Executive's portfolio of model speeches for all occasions/ Diana Booher
Prentice-Hall, 1991
 Buku Teks
Sprague, Jo, author
The speaker's handbook
Wadsworth/Cengage Learning, 2013
 Buku Teks
Dean, John J.
Effective speaking here's how / John J. Dean
Boolarong Publications, 1987
 Buku Teks
Gipson, James H.
Winning the investment game a guide for all seasons / James M. Gibson
McGraw-Hill Book, 1984
 Buku Teks
Sprague, Jo, author
Speaker's handbook
Wadsworth and Cengage Learning, 2013
 Buku Referensi
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