Hutagalung, Gomgom Basa
Fakultas Sastra Universitas Indonesia, 1997
Buku Teks
Bendix, Reinhard
Anchor Books, 1962
Buku Teks
Ahmad Sadri
Oxford University Press, 1992
Buku Teks
Soerjono Soekanto
Rajawali, 1985
Buku Teks
Wrong, Dennis H.
Ikon Teralitera, 2003
Buku Teks