edited by Di Lewis
Queensland University of Technology, 1999
Buku Teks
VanderMey, Randal, author
Wadsworth and Cengage Learning, 2012
Buku Teks
Watson, George, author
Longman, 1987
Buku Teks
Weaver, Patricia C., author
Free Press, 1977
Buku Teks
Zinsser, William, author
Harper Collins, 1990
Buku Teks