edited by Kevin Gilbert
Penguin Books, 1988
Buku Teks
Rowley, C.D., author
Australian National University Press, 1971
Buku Teks
Artikel Jurnal
edited by Marie Reay
Angus & Robertson, 1964
Buku Teks
edited by Marcello A. Canuto and Jason Yaeger
Routledge, 2000
Buku Teks