APA (7th ed.) Citation

Penna, C. V., Foskett, D. J., & Sewell, P. H. (1977). National library and information services: A handbook for planners. Butterworths.

Chicago Style (17th ed.) Citation

Penna, Carlos Víctor, D. J. Foskett, and Philip Hooper Sewell. National Library and Information Services: A Handbook for Planners. London ; Boston: Butterworths, 1977.

MLA (8th ed.) Citation

Penna, Carlos Víctor, et al. National Library and Information Services: A Handbook for Planners. Butterworths, 1977.