J. Winardi
Kencana Prenada Media, 2015
Buku Teks SO
J. Winardi
Kencana Prenada Media, 2003
Buku Teks SO
edited by Calvin A. Kent, Donald L. Sexton and Karl H. Vesper
Prentice-Hall, 1982
Buku Referensi
Birley, Sue
Financial Times, Prentice-Hall, 2000
Buku Teks SO
Birley, Sue
Financial Times, Prentice-Hall, 2000
Buku Teks SO