Hartmann, Heiko. "Wehrli, Max" Handbook of Medieval Studies. Berlin, Boston: De Gruyter, 2010. 2709-2711. Web. Retrieved 21 May. 2013, from http://www.degruyter.com/view/books/9783110215588/9783110215588.2709/9783110215588.2709.xml

Hartmann, H. (2010). Wehrli, Max. Handbook of Medieval Studies (pp. 2709-2711). Berlin, Boston: De Gruyter. Retrieved 21 May. 2013, from http://www.degruyter.com/view/books/9783110215588/9783110215588.2709/9783110215588.2709.xml

Hartmann, Heiko. 2010. Wehrli, Max. In Handbook of Medieval Studies, 2709-2711. Berlin, Boston: De Gruyter. Retrieved 21 May. 2013, from http://www.degruyter.com/view/books/9783110215588/9783110215588.2709/9783110215588.2709.xml