McLean, Andrew James, author
Wiley, 2001
Buku Teks
Kau, James B., author
McGraw-Hill, 1985
Buku Teks
Shilling, James D., author
South-Western, 2002
Buku Teks
David Y.W. Ho
Butterworth Asia, 1998
Buku Teks
Shenkel, William M., author
McGraw-Hill , 1978
Buku Teks