Daoism: A Short Introduction Oxford: Oneworld Publications, 2003
ما أقدم حضارة في العالم
, entry in historical sourcebook by Mahlon H
اقدم عشر حضارات قديمة بشرية في التاريخ
Patrick Symmes, "History in the Remaking: a temple complex in Turkey that predates even the is rewriting the story of human evolution," , March 1, 2010, pp