(2005). Acquiring copyright permission to digitize and provide open access to books / by Denise Troll Covey.
Παραπομπή σε μορφή Chicago (17η εκδ.)Acquiring Copyright Permission to Digitize and Provide Open Access to Books / by Denise Troll Covey. 2005.
Παραπομπή σε μορφή MLA (9th εκδ.)Acquiring Copyright Permission to Digitize and Provide Open Access to Books / by Denise Troll Covey. 2005.
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