Cita APA (7th ed.)

Day, A., & Harvet, J. M. (1994). Walford's guide to reference material: Social and historical sciences,philosophy and religion (6th ed.). Library association publishing.

Cita Chicago (17th ed.)

Day, Alan, i Joan M. Harvet. Walford's Guide to Reference Material: Social and Historical Sciences,philosophy and Religion. 6th ed. London: Library association publishing, 1994.

Cita MLA (9th ed.)

Day, Alan, i Joan M. Harvet. Walford's Guide to Reference Material: Social and Historical Sciences,philosophy and Religion. 6th ed. Library association publishing, 1994.