Taffinder, Paul
Encyclopaedia of management : leadership vol. 1
Crest publishing, 1999
Buku Referensi
Bolt, Gordon
Encyclopaedia of management : marketing and sales vol. 6
Crest publishing, 1999
Buku Referensi
Singh, U.K.
International encyclopaedia of professional management : vol. 1, public relations management
Anmol Publications, 1998
Buku Referensi
Singh, U.K.
International encyclopaedia of professional management : vol. 2, marketing management
Anmol Publications, 1998
Buku Referensi
Johannsen, Hano
Encyclopaedia of management ; dictionary of management
Crest Publishing House, 1999
Buku Referensi