Beale, Geoffrey
University Park, 1978
Buku Teks
Chun Li, Ching
The University of Chicago Press, 1955
Buku Teks
Simson, Graeme, author
Simon & Schuster Paperback, 2014
Buku Teks
Waldholz, Michael
Simon & Schuster , 1997
Buku Teks
Meneely, Philip, author
Oxford Univesity Press, 2009
Buku Teks