edited by Charles Peters and Jonathan Alter
Prentice-Hall, 1985
Buku Teks
Delphos, William, 1951-, author
Business Expert Press, 2012
Buku Teks
Patel, Alpesh B, author
Palgrave Macmillan, 2005
Buku Teks
Morrison, Herbert, author
Oxford University Press, 1960
Buku Teks
edited by Alan F. Westin
W.W. Norton, 1961
Buku Teks