APA (7th ed.) Citation

(1992). Walford's concise guide to reference material (2. ed.). Library Assoc.

Chicago Style (17th ed.) Citation

Walford's Concise Guide to Reference Material. 2. ed. London: Library Assoc, 1992.

MLA (9th ed.) Citation

Walford's Concise Guide to Reference Material. 2. ed. Library Assoc, 1992.