editors, Ronald J. Burke, Cary L. Cooper
Edward Elgar, 2012
Buku Teks
Anthony, Robert Newton, 1916-2006
McGraw-Hill, 1999
Buku Teks
Alioto, Robert F.
Harper & Row, 1971
Buku Teks
Brown, Alvin
Prentice-Hall, 1947
Buku Teks
Brown, Alvin
Hibbert Printing Company, 1945
Buku Teks