Cole, Rodney, author
Saunders College, 1993
Buku Teks
Crawford, Frank S.
McGraw-Hill, 1968
Buku Teks
Stebben, Gregg, author
Pocket Books, 1999
Buku Referensi
Dayou, Wu
Zhengzhong Shuju Yinhang, 1984
Buku Teks
Bamberg, Paul, author
University of Cambridge, 1995
Buku Teks