Hopkins, Gerard Manley, author
Clarendon Press, 1990
Buku Teks
Kalamaras, Vasso
Fremantle Arts Centre Press, 1989
Buku Teks
M.Paz. Galupo
Routledge, 2009
Buku Teks
Carrison, Dan, author
[American Management Association, ], 2003
eBooks
Hawkins, Barrie, author
Piatkus, 1993
Buku Teks