Suwardi M.S., author
Departemen Pendidikan dan Kebudayaan RI, 1990
Buku Teks
Taymur, Mahmud, author
[publisher not identified], [date of publication not identified]
Buku Teks
Hofstede, Geert, author
Van Gorcum, 1976
Buku Teks
Hatch, Lewis F.
Gulf Publishing Company, 1912
Buku Teks
Cucu Kartini Suhiadi, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1988
UI - Skripsi (Membership)