Sharpe, Leslie T.
Camberidge University Press , 1994
Buku Teks SO
Gilmore, Gene
Body & Fraser Publishing Company, 1997
Buku Teks SO
Gilmore, Gene
The Glindersany, 1971
Buku Teks SO
Rivers, William L.
Wadsworth, 1983
Buku Teks SO
Putri Susanti
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2014
UI - Tesis Membership