Netzley, Michael, author
Prentice-Hall, 2001
Buku Teks
Mundhenk, Robert T., author
Houghton Mifflin, 1978
Buku Teks
O`Neil, L. Peat, author
Writer's Digest Books, 1995
Buku Teks
Lerner, Marcia, author
Random House, 2001
Buku Teks
Vaughn, Lewis, author
Oxford , 2006
Buku Teks