Cita APA

Walford, A. J. (1990). Walford's guide to reference material. London: Library Association Publishing.

Citación estilo Chicago

Walford, A. J. Walford's Guide to Reference Material. London: Library Association Publishing, 1990.

Cita MLA

Walford, A. J. Walford's Guide to Reference Material. London: Library Association Publishing, 1990.

Precaución: Estas citas no son 100% exactas.