Mair, Christian, author
Cambridge University Press, 2006
Buku Teks
Richards, Michael D, author
John Wiley & Sons, 2014
Buku Teks
Palmer, Alan, author
Penguin Books , 1987
Buku Referensi
Robinson, Michael Edison, author
University Hawaii Press, 2007
Buku Teks
edited by Peter Duus
Cambridge University Press, 1995
Buku Referensi