Dyfyniad APA

Penna, C. V. (1977). National library and information services: A handbook for planners. Butterworths.

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.