Παραπομπή APA

Cough C S. (1979). National library and information services: A handbook for planners. Butter worths.

Παραπομπή Chicago Style

Cough C S. National Library and Information Services: A Handbook for Planners. London: Butter worths, 1979.

Παραπομπή MLA

Cough C S. National Library and Information Services: A Handbook for Planners. Butter worths, 1979.