Hammer, Michael, 1948-2008
Harper Collins, 2003
Buku Teks
Gevirtz, Don
G.P. Putnam`s Sons, 1984
Buku Teks
Drucker, Peter Ferdinand, 1909-2005
Heinemann Profesional , 1990
Buku Teks
Carr, Edward Hallet
Beacon Pers, 1951
Buku Teks
edited by Miltiadis D. Lytras ... [and others]
Springer, 2008
Buku Teks