Gilmore, Charles M., author
McGraw-Hill, 1981
Buku Teks
Leventhal, Lance A., author
Prentice-Hall, 1987
Buku Teks
Prentice-Hall, 1990
Buku Teks
Short, Kenneth L.
Prentice-Hall, 1981
Buku Teks
Bolton, W. (William), 1933-, author
Longman , 2000
Buku Teks