Thorne, Kaye
Encyclopaedia of management; training
Crest publishing, 1999
 Buku Referensi
Encyclopaedia of management training
edited by M.D. Jitendra
Anmol Publications,
 Buku Referensi
Encyclopaedia of management training
edited by M.D. Jitendra
Anmol Publications, 1999
 Buku Referensi
Johannsen, Hano
Encyclopaedia of management ; dictionary of management
Crest Publishing House, 1999
 Buku Referensi
Encyclopaedia of project management
edited by M.D. Jitendra
Anmol Publications, 1999
 Buku Referensi