APA Edition Citation

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

Chicago Edition Citation

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

MLA Edition Citation

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

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