APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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