APA (7th ed.) Zitazioa

(1977). National library and information services: A handbook for planners. Butterworths.

Chicago Style (17th ed.) Zitazioa

National Library and Information Services: A Handbook for Planners. London: Butterworths, 1977.

MLA (9th ed.) Zitazioa

National Library and Information Services: A Handbook for Planners. Butterworths, 1977.