Matteo, M. Robin, author
Brooks/Cole, 1991
Buku Teks
Dini Tri Hastuti, author
2004
UI - Skripsi (Membership)
edited by David Kelleher and Sheila Hillier
Routledge, 1996
Buku Teks
Sigit Wijayanta
Yakkum , 2002
Buku Teks
John Wiley & Sons, 1988
Buku Teks