Hutagalung, Arie E., author
Faculty Of Law University, 1993
Buku Teks
Arie Sukanti Sumantri, author
Universitas Indonesia, 1993
Buku Teks
Burnham, Scott J., author
The Michie Company, 1993
Buku Teks
I.G. Rai Widjaja, author
Megapoin, 2004
Buku Teks
general editor, Philip Rubens
Henry Holt and Company, 1992
Buku Referensi