edited by George Clack
[publisher not identified], 1998
Buku Teks
Nickel, James W., author
Blackwell , 2007
Buku Teks
Sagala, Shanty Sofiarli, author
Universitas Indonesia, 2008
UI - Skripsi (Open)
Universitas Indonesia, 2008
UI - Skripsi (Open)
Universitas Indonesia, 1984
UI - Skripsi (Membership)