Villars, Pierre, Karin Cenzual and Roman Gladyshevskii. Handbook. Berlin, Boston: De Gruyter, 2012. Web. Retrieved 22 May. 2013, from http://www.degruyter.com/view/product/181101

Villars, P., Cenzual, K. & Gladyshevskii, R. (2012). Handbook. Berlin, Boston: De Gruyter. Retrieved 22 May. 2013, from http://www.degruyter.com/view/product/181101

Villars, Pierre, Karin Cenzual and Roman Gladyshevskii. 2012. Handbook. Berlin, Boston: De Gruyter. Retrieved 22 May. 2013, from http://www.degruyter.com/view/product/181101