Artikel Jurnal
Babcock, Tim G., author
Gadjah Mada University Press, 1989
Buku Teks
Constantino, Renato, author
Merlin Press, 1978
Buku Teks
Walker, David, author
Australian National University Press, 1976
Buku Teks
edited by Barbara Ching and Gerald W. Creed
Routledge , 1997
Buku Teks