RDA Toolkit. Resource Description and Access. Berlin, Boston: De Gruyter Saur, 2012. Web. Retrieved 26 May. 2013, from http://www.degruyter.com/view/db/rda

RDA Toolkit. Resource Description and Access. (2012). Berlin, Boston: De Gruyter Saur. Retrieved 26 May. 2013, from http://www.degruyter.com/view/db/rda

RDA Toolkit. Resource Description and Access. 2012. Berlin, Boston: De Gruyter Saur. Retrieved 26 May. 2013, from http://www.degruyter.com/view/db/rda