APA Edition Citation

Vickery B C. (1968). On retrieval system theory. Butter worths.

Chicago Edition Citation

Vickery B C. On Retrieval System Theory. London: Butter worths, 1968.

MLA Edition Citation

Vickery B C. On Retrieval System Theory. Butter worths, 1968.

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