Ahmed, Ash, author
Routledge, 2015
Buku Teks
edited by Allan S. Hoofman
Elsevier, 2004
Buku Teks
Meier, Michael L.
Pearson Education, 2005
Multimedia
Meier, Michael L.
2005
Multimedia
Shackelford, James F., author
Prentice Hall International, 1996
Buku Teks