APA (7th ed.) Citation

Drubba, H., & Walford, A. J. (1989). Walford's guide to reference material (5th ed.). Library Association.

Chicago Style (17th ed.) Citation

Drubba, H., and A. J. Walford. Walford's Guide to Reference Material. 5th ed. London: Library Association, 1989.

MLA (9th ed.) Citation

Drubba, H., and A. J. Walford. Walford's Guide to Reference Material. 5th ed. Library Association, 1989.