Simanjuntak, Hotma, author
Universitas Indonesia, 1994
UI - Tesis (Membership)
Lindsay, Jennifer, author
Gadjah Mada University Press , 1991
Buku Teks
Koesnadi Hardjasoemantri, author
Gajah Mada University Press, 1996
Buku Teks
Fitriana Firdaus, author
2000
UI - Skripsi (Membership)
Sri Newindraty, author
1995
UI - Skripsi (Membership)