Jewler, A. Jerome
Wodsworth, 1981
Buku Teks
Hammer, Michael, 1948-2008, author
Harper Collins, 2003
Buku Teks
Barker, Hannah, author
Oxford University Press, 2017
eBooks
Ray, Michael, author
Tian Xia Wen Hua, 1991
Buku Teks
Simmons, James G.
Prentice-Hall, 1982
Buku Teks