Ward, P. L. E. (1980). The Professional development of the librarian and information worker.
استشهاد بنمط شيكاغوWard, Patricia Layzell; Ed. The Professional Development of the Librarian and Information Worker. London, Aslib, 1980.
MLA استشهادWard, Patricia Layzell; Ed. The Professional Development of the Librarian and Information Worker. 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.