Welker, J. (2012). Counting on COUNTER: The Current State of E-Resource Usage Data in Libraries.
Citazione stile Chigago Style (17a edizione)Welker, Josh. Counting on COUNTER: The Current State of E-Resource Usage Data in Libraries. 2012.
Citatione MLA (9a ed.)Welker, Josh. Counting on COUNTER: The Current State of E-Resource Usage Data in Libraries. 2012.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.