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.

Harrod, 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.

Harrod, 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.