Cita APA

(1987). Walford's guide to reference material (4th ed.). Library Association.

Citación estilo Chicago

Walford's Guide to Reference Material. 4th ed. London: Library Association, 1987.

Cita MLA

Walford's Guide to Reference Material. 4th ed. Library Association, 1987.

Warning: These citations may not always be 100% accurate.