Pasaribu, Evy Lasma, author
Universitas Indonesia, 1994
UI - Skripsi (Membership)
Universitas Indonesia, 2000
UI - Skripsi (Membership)
Rachmadi Usman, author
Citra Aditya Bakti, 2002
Buku Teks
Rachmadi Usman, author
Gramedia Pustaka Utama, 2003
Buku Teks
Rachmadi Usman, author
Gramedia Pustaka Utama , 2001
Buku Teks