Cita APA (7th ed.)

Farthorne, R. A. (1961). Towards information retrieval. Butterworths.

Cita Chicago (17th ed.)

Farthorne, Robert Arthur. Towards Information Retrieval. London: Butterworths, 1961.

Cita MLA (9th ed.)

Farthorne, Robert Arthur. Towards Information Retrieval. Butterworths, 1961.