Nagoya University of Commerce and Business,
Majalah, Jurnal, Buletin
Hanson, John Lloyd
MacDonald & Evans, 1975
Buku Teks
University of Melbourne ,
Majalah, Jurnal, Buletin
edited by Richard Ivan Downing
Weidenfeld and Nicolson, 1973
Buku Teks
Asian Institute of Management,
Majalah, Jurnal, Buletin