Kahn, Robert L., 1918-, author
John Wiley & Sons, 1981
Buku Teks
Dewis, M., author
MacDonald and Evans, 1978
Buku Teks
Pheasant, Stephen, author
Macmillan, 1991
Buku Teks
edited by Marc J. Schabracq, Jacques A.M. Winnubst, Cary L. Cooper
John Wiley & Sons, 2003
Buku Teks
Golightley, Malcom, author
Learning matters Ltd., 2008
Buku Teks