Stevenson, Nancy, author
Andi, 2002
Buku Teks
Furtwengler, Dale, author
Andi, 2003
Buku Teks
O`Leary, Elizabeth, author
Andi, 2002
Buku Teks
Davidson, Jeff, author
Andi , 2002
Buku Teks
editor, A. Dale Timpe; translator, Susanto Budidharmo
Elex Media Komputindo, 1991
Buku Referensi