Frisch, Aeleen
O"Reilly & Associates, Inc., 1993
Buku Teks
Nemeth, Evi
Prentice-Hall, 1989
Buku Referensi
Evi Nemeth [and seven others]
Addison-Wesley, 2018
Buku Teks
Peak, Kenneth J.
Prentice-Hall, 1995
Buku Teks
Graduate School of Business, Stanford University, 1959
Buku Teks