Andrews, jean, author
Course technology cengage learning, 2013
Buku Teks
Lammle, Todd, author
Wiley , 2011
Buku Teks
McGraw-Hill , 1998
Buku Teks
edited by Harold F. Tipton
CRC Press, 2012
Buku Teks
Neal, Patrick Terrence
McGraw-Hill, 1999
Buku Referensi