Twitty, William B., author
Elex Media Komputindo, 1987
Buku Teks
Ian Chandra K., author
Elex Media Komputindo, 1990
Buku Teks
Universitas Indonesia, 1994
UI - Skripsi (Membership)
O`Keeffe, Linda, author
McGraw-Hill, 1986
Buku Teks
Glau, Gregory R., author
Doa Jones-Irwin, 1986
Buku Teks