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