Universitas Indonesia, 1998
UI - Skripsi (Membership)
R. Sario, author
Nasional Firma M. A. Yahya, [date of publication not identified]
Buku Teks
Universitas Indonesia, 1985
UI - Skripsi (Membership)
Gatot Supramono, author
Pustaka Kartini, 1989
Buku Teks
Gatot Supramono, author
Pustaka Kartini, 1989
Buku Referensi