Finch, Frank, author
Fac On File Publications, 1985
Buku Referensi
Statt, David A., author
Routledge, 1999
Buku Referensi
Kurian, George Thomas, author
Amacom, 2013
Buku Referensi
Kurian, George Thomas, author
[American Management Association, ], 2013
eBooks
Braun, C. A., author
NIVE, 1986
Buku Referensi