Valid, R.
John Wiley & Sons, 1995
Buku Teks
Spiegel, Murray R., author
McGraw-Hill, 1974
Buku Teks
Brown, James Ward, 1934-, author
McGraw-Hill, 2012
Buku Teks
Zill, Dennis G., author
Brooks/Cole & Cengage Learning, 2013
Buku Teks
Boyce, William E., author
John Wiley & Sons, 1977
Buku Teks