APA (7th ed.) Citation

Library Association, Walford, A. J., Mullay, M., & Schlicke, P. (1999). Walford's guide to reference materials. Library Association Pub.

Chicago Style (17th ed.) Citation

Library Association, A. J. Walford, Marilyn Mullay, and Priscilla Schlicke. Walford's Guide to Reference Materials. London: Library Association Pub, 1999.

MLA (9th ed.) Citation

Library Association, et al. Walford's Guide to Reference Materials. Library Association Pub, 1999.