Zinsser, William, author
Harper Collins, 1990
Buku Teks
Zinsser, William, author
A HarperResource Book, 2001
Buku Teks
Statsky, William P., 1943-, author
West Publishing, 1977
Buku Teks
Statsky, William P., 1943-, author
Buku Teks
Lindsay, David, author
Longman, 1995
Buku Teks