Carrell, Michael R.
Macmillan, 1992
Buku Teks
by Herbert G. Henemen III ... [et.al.]
Richard D. Irwin, 1989
Buku Teks
Bernardin, H. John
McGraw-Hil, 1993
Buku Teks
Glueck, William F.
Business Publications , 1982
Buku Teks
Bernardin, H. John
McGraw-Hill, 2003
Buku Teks