Jefferson, Michael
Cavendish Publishing , 1994
Buku Teks
Daniels, Kathy, author
Chartered Institute of Personnel and Development, 2012
Buku Teks
Whincup, Michael H., 1929-
Butterworth-Heinemann, 1995
Buku Teks
Whincup, Michael H., 1929-, author
Butterworth-Heinemann, 1995
Buku Teks
Keenan, Denis T., author
Pitman, 1970
Buku Teks