edited by George Fink
Academic Press, 2016
Buku Teks
Harvard Business School
Harvard Business Review Press, 2010
Buku Teks
Tucker, Mary, author
Prentice-Hall, 2002
Buku Teks
O Kelly, Denis
McGraw-Hill, 1991
Buku Teks
Ellis, Albert, author
Grasindo, 2005
Buku Teks