edited by Arthur J. Reynolds, Arthur J. Rolnick, Judy A. Temple
Cambrigde University Press , 2014
Buku Teks
Robertson, Cathie, 1946-
Wadsworth and Cengage Learning, 2013
Buku Teks
Gilbert, Glen G.
Jones and Burtlet, 2011
Buku Teks
Porterfield, John D.
Voice American Forum Lecture, [date of publication not identified]
Buku Teks
Shields, James J,Jr
Frederick A. Preager, 1967
Buku Teks