Stock Wolfgang G. Knowledge and Information. Studies in Information Science / Studien zur Informationswissenschaft. Berlin, Boston: De Gruyter Saur, n.d.. Web. Retrieved 20 May. 2013, from http://www.degruyter.com/view/serial/39677

Stock W. (n.d.). Knowledge and Information. Studies in Information Science / Studien zur Informationswissenschaft. Berlin, Boston: De Gruyter Saur. Retrieved 20 May. 2013, from http://www.degruyter.com/view/serial/39677

Stock Wolfgang G. n.d. Knowledge and Information. Studies in Information Science / Studien zur Informationswissenschaft. Berlin, Boston: De Gruyter Saur. Retrieved 20 May. 2013, from http://www.degruyter.com/view/serial/39677