Kotter, John P., 1947-
Addison-Wesley, 1978
Buku Teks
Herbert, Theodore T.
Macmillan, 1976
Buku Teks
Greenwood, William T.
South Western, 1965
Buku Teks
Schneider, Arnold E.
McGraw-Hill, 1975
Buku Teks
Hashim Fadzil Ariffin
Universiti Teknologi MARA, Malaysia, 2015
Artikel Jurnal