Hutagalung, Gomgom Basa, author
Universitas Indonesia, 1982
UI - Disertasi (Membership)
Hutagalung, Gomgom Basa, author
Fakultas Sastra Universitas Indonesia, 1997
Buku Teks
Bendix, Reinhard, author
Anchor Books, 1962
Buku Teks
Ahmad Sadri
Oxford University Press, 1992
Buku Teks
Soerjono Soekanto, author
Rajawali, 1985
Buku Teks