McRae, John, author
Routledge, 1999
Buku Teks
Strickland, Carol, author
Andrews McMeel, 2001
Buku Teks
Mansfield, Richard, author
Elex Media Komputindo, 2002
Buku Teks
Shepard, Steven, author
McGraw-Hill, 2001
Buku Teks
Moulaison, Heather Lea
Libraries Unlimited, 2015
Buku Teks