Kirk, John T.
Harry N. Abrams, 2000
Buku Referensi
Daniels, Lawrence J., 1942-
[American Management Association;, ], 2013
eBooks
Jeary, Alan
E & FN Spon, 1997
Buku Referensi
Christina J. Hopfe and Robert S. McLeod, editors
Routledge, Taylor & Francis Group, 2017
Buku Teks
Whiffen, Marcus
MIT Press, 1992
Buku Teks