1
by Kropotkin, Petr Alekseevich
Published 1915
Heinemann

2
by Blau, Peter Michael
Published 2003
Stanford Business Books

3
by Graff, Harvey J.
Published 1987
Indiana University Press

4
by Beck, Ulrich
Published 2002
SAGE

5
by Collins, Randall
Published 2004
Princeton University Press