Konopaske, Robert
McGraw-Hill, 2018
Buku Teks
Vardi, Yoav
LEA, 2004
Buku Teks
Litterer, Joseph August, 1926-
John Wiley & Sons, 1980
Buku Teks
Martin, Garry, 1941-
Prentice Hall International, Inc., 1992
Buku Teks
Martin, Garry, 1941-
Prentice-Hall, 1996
Buku Teks