Fogg, G. E. (Gordon Elliott), 1919-, author
The University ofWisconsin press, 1987
Buku Teks
Bessette, Jean Michel
L`Harmatten, 1999
Buku Teks
Ehrmann, Henry W., author
Prentice-Hall, 1976
Buku Teks
Samovar, Larry A., author
Wadsworth and Cengage Learning, 2010
Buku Teks
Samovar, Larry A., author
Thompson/Wadsworth, 2007
Buku Teks