Newton Miller, Laura. “Demand-Driven Acquisition E-Books Have Equal Cost Per Use As Print, But DDA Has Much More Active Use Overall”. Evidence Based Library and Information Practice 10, no. 1 (March 6, 2015): 89–91. Accessed July 8, 2025. https://journals.library.ualberta.ca/eblip/index.php/EBLIP/article/view/23453.