Zinsser, William, author
Harper Collins, 1990
Buku Teks
Zinsser, William, author
A HarperResource Book, 2001
Buku Teks
Margaret Anzul, author
Routledge, 2001
Buku Teks
Maimon, Elaine P., author
McGraw-Hill , 2003
Buku Referensi
Lindsay, David, author
Longman, 1995
Buku Teks