Drüen, Klaus-Dieter, Peter Hommelhoff, Rainer Hüttemann, et al. Band 5 §§ 238-289a. Berlin, Boston: De Gruyter, 2013. Web. Retrieved 23 May. 2013, from http://www.degruyter.com/view/product/175676

Drüen, K., Hommelhoff, P., Hüttemann, R., et al. (2013). Band 5 §§ 238-289a. Berlin, Boston: De Gruyter. Retrieved 23 May. 2013, from http://www.degruyter.com/view/product/175676

Drüen, Klaus-Dieter, Peter Hommelhoff, Rainer Hüttemann, et al. 2013. Band 5 §§ 238-289a. Berlin, Boston: De Gruyter. Retrieved 23 May. 2013, from http://www.degruyter.com/view/product/175676