Harrod, L. M. (1977). Librarian's Glossary of Terms Used in Librarianship, Documentation and the Book Crafts and Reference Book (4th rev ed.). Indian book company.
Dyfyniad Arddull ChicagoHarrod, Leonard Montague. Librarian's Glossary of Terms Used in Librarianship, Documentation and the Book Crafts and Reference Book. 4th rev ed. New Delhi: Indian book company, 1977.
Dyfyniad MLAHarrod, Leonard Montague. Librarian's Glossary of Terms Used in Librarianship, Documentation and the Book Crafts and Reference Book. 4th rev ed. Indian book company, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.