APA (7th ed.) Citation

Walford, A. J., Day, A., Harvey, J. M., & Mullay, M. (1990). Walford's guide to reference material (5th ed.). Library Association.

Chicago Style (17th ed.) Citation

Walford, Albert John, Alan Day, Joan M. Harvey, and Marilyn Mullay. Walford's Guide to Reference Material. 5th ed. London: Library Association, 1990.

MLA (9th ed.) Citation

Walford, Albert John, et al. Walford's Guide to Reference Material. 5th ed. Library Association, 1990.