Prytherch, R. (1990). Harrod's librarians' glossary of terms used in librarianship, documentation and the book crafts and reference book (seventh edition.). Gower.
Παραπομπή σε μορφή Chicago (17η εκδ.)Prytherch, Ray. Harrod's Librarians' Glossary of Terms Used in Librarianship, Documentation and the Book Crafts and Reference Book. seventh edition. Aldershot: Gower, 1990.
Παραπομπή σε μορφή MLA (8th εκδ.)Prytherch, Ray. Harrod's Librarians' Glossary of Terms Used in Librarianship, Documentation and the Book Crafts and Reference Book. seventh edition. Gower, 1990.
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