Shilling, Dana
Prentice-Hall, 1998
Buku Referensi
Greenberg, Jerald
Prentice-Hall, 2003
Buku Teks
edited by S. Robert Hernandez, Stephen J.O.Connor
Delmar/Cengage Learning, 2010
Buku Teks
Bohlander, George W.
Thomson, 2004
Buku Teks
Werther, William B.
McGraw-Hill, 1993
Buku Teks