Artikel Jurnal
Marti Fauziah Ariastuti
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2011
UI - Tesis (Open)
Davis, Gordon B.
Barron's Educational Series, 1979
Buku Teks
Oliver, Paul, editor
Sage, 2014
Buku Teks
Claiborne, Robert
Time-Life Books, 1974
Buku Teks