Meland, Bernard Eugene
Oxford University Press , 1953
Buku Teks SO
Lilawati Kurnia
Faculty of Humanities University of Indonesia, 2014
Artikel Jurnal
Din Wahid
Faculty of Humanities University of Indonesia, 2015
Artikel Jurnal
edited by Mary Bryden
Routledge, 2001
Buku Teks SO
editor, James F. Fox
Archipelago Press, 1999
Buku Referensi