Cita APA (7th ed.)

Vickery, B. C. (1965). On retrieval system theory (2nd ed.). Butterworths.

Cita Chicago (17th ed.)

Vickery, B. C. On Retrieval System Theory. 2nd ed. London: Butterworths, 1965.

Cita MLA (8th ed.)

Vickery, B. C. On Retrieval System Theory. 2nd ed. Butterworths, 1965.