Harahap, B., author
Balai Aksara, 1981
Buku Teks
Spiegel, Murray R., author
Erlangga, 1986
Buku Teks
Purcell, Edwin J. (Edwin Joseph), 1901-, author
[publisher not identified], 1996
Buku Teks
Sutan Negoro
Balai Aksar, 1981
Buku Teks
Universitas Indonesia, 1989
UI - Skripsi (Membership)