Ernest Wehr, Paul; Paul Wehr, Heidi Burgess, Guy M. Burgess. Justice without violence. Lynne Rienner Publishers. 1994年: 28-29页 [2006-05-22]. ISBN 9781555874919. (原始内容存档于2015-03-21) (英语).引文使用过时参数coauthors (帮助)
Ernest Wehr, Paul; Paul Wehr, Heidi Burgess, Guy M. Burgess. Justice without violence. Lynne Rienner Publishers. 1994年: 28-29页 [2006-05-22]. ISBN 9781555874919. (原始内容存档于2015-03-21) (英语).引文使用过时参数coauthors (帮助)