Portman, Jackie, author
Wiley-Blackwell, 2014
Buku Teks
edited by Neil Appleton
Design Media Publishing, 2013
Buku Referensi
Schucller, Wolfgang, author
Prentice-Hall, 1996
Buku Teks
Frederick S. Merritt and Jonathan T. Ricketts, editor
McGraw-Hill, Inc, 1994
Buku Referensi
Ambrose, James E., author
John Wiley & Sons, 1995
Buku Referensi