McPhee, Margaret
Allen & Unwin, 1993
Buku Referensi
Meinhardt, Peter
Gower Press, 1971
Buku Teks
Castleden, Rodney
Chartwell Books, 2007
Buku Teks
Koelb, Clayton
Cornell University Press , 1988
Buku Teks SO
Steinhauer, Hein
Faculty of Humanities University of Indonesia, 2011
Artikel Jurnal