Drake Beam Morin, 1993
Buku Teks
edited by Debbie Millman
Rockport Publishers, 2012
Buku Referensi
Lancaster, Greoff, author
Crest, 2001
Buku Teks
Morse, Stephen A., author
Crest Publishing House, 2001
Buku Teks
Evans, Joel R.
MacMillan Publishing Company, 1990
Buku Teks