Strother, Edgar E.
North-China Daily News and Herald , 1927
Buku Teks
Ingpen, Robert, author
Dragon's World, 1993
Buku Referensi
Mehta, Pavithra K., author
Berrett Koehler, 2011
Buku Teks
Cohen, William A., author
American Management Association, 2008
eBooks
Cohen, William A., 1937- , author
American Management Association, 2008
eBooks