Hertzman, Clyde
DC The International Bank for Reconstruction and Development , 1995
Buku Teks
Alenka Selih
Springer, 2012
eBooks
East, Roger, author
Pinter Publishers, 1997
Buku Teks
edited by Andrew Blasko, Diana Januauskiene
Council for Research in Values and Philosophy, 2008
Buku Teks
Robbins, Peter T., editor
Springer, 2011
eBooks