Kotter, John P., 1947-, author
The Free Press, 1982
Buku Teks
Westwood, Roberta, author
American Society for Training & Development, 2011
eBooks
Koontz, Harold, author
McGraw-Hill , 1971
Buku Teks
Cousins, Donald, author
English Universities Press , 1955
Buku Teks
Mather, L. C. (Leonard Charles)
Waterlow and Sons Limited, 1972
Buku Teks