Goddard, Lisa. “Getting to the Source: A Survey of Quantitative Data Sources Available to the Everyday Librarian: Part II: Data Sources from Specific Library Applications”. Evidence Based Library and Information Practice 2, no. 1 (March 14, 2007): 68-88. Accessed May 29, 2020. https://journals.library.ualberta.ca/eblip/index.php/EBLIP/article/view/152.