Jelaskan Rujukan dari Carl O. Sauer dalam bahasa melayu

Carl Sauer on Culture and Landscape:Readings and Commentaries edited by William M. Denevan and Kent Mathewson. Baton Rouge LA.:Louisiana State University Press, 2009 ISBN 978-0-8071-3394-1

Carl O Sauer. Northern Mists. Berkeley: University of California Press. 1968