Cita APA (7a ed.)

Vickery, B. C. (1961). On retrieval system theory. Butterworths.

Cita Chicago Style (17a ed.)

Vickery, Brian Campbell. On Retrieval System Theory. London: Butterworths, 1961.

Cita MLA (9a ed.)

Vickery, Brian Campbell. On Retrieval System Theory. Butterworths, 1961.