Lukman Hakim
Erlangga, 2012
Buku Teks SO
Al-Assal, Ahmad Muhammad
Serambi Timur, [Date of publication not identified]
Buku Teks SO
Al-Assal, Ahmad Muhammad
Bina Ilmu, 1980
Buku Teks
Case, Karl E.
Erlangga, 2007
Buku Teks SO
Kaelany H.D.
Universitas Indonesia, 1996
UI - Laporan Penelitian