Williams, Norma
Tiger Books International, 1990
Buku Referensi
Carlson, Karen J.
Harvard Universiy press , 1996
Buku Teks
Carlson, Karen J.
1996
Multimedia
Carlson, Karen J.
Harvard University Press, 1996
Multimedia
edited by Brenna H. Mayer
lippincott Willims & Wilkins, 2005
Buku Teks