Zimmerman, Jerold L., 1947-, author
McGraw-Hill, 2003
Buku Teks
Radford, K.J., author
Prushin-Hall, 1974
Buku Teks
Blair, Roger D., author
McGraw-Hill, 1987
Buku Teks
Blair, Roger D., author
McGraw-Hill, 1987
Buku Teks
Snyder, Richard C., author
Free Press, 1962
Buku Teks