Akpena, Johnson. «Influence of Librarian’s Attitudes on the Marketing of Information Resources and Services in University Libraries in North Central Zone Nigeria». Lokoja Journal of Information Science Research 1, no. 2 (декабрь 18, 2023): 97–107. просмотрено сентябрь 2, 2025. https://ljisr.net.ng/lis/article/view/22.