Bennet-Alexander, Dawn, author
Irwin/McGraw-Hill, 2004
Buku Teks
Jackson, Grdon E., author
Prentice-Hall, 1993
Buku Referensi
McDonald, Janis L., author
Pearson/Prentice Hall, 2006
Buku Teks
Blanpain, Roger, author
Kluwer, 2008
Buku Teks
Maimunah Aminuddin, author
MC-Graw-Hill , 2011
Buku Teks