Παραπομπή APA

Sharma ,C D & Vyas ,Kailas. (1980). Handbook for information systems and services. UNESCO.

Παραπομπή Chicago Style

Sharma ,C D & Vyas ,Kailas. Handbook for Information Systems and Services. Paris: UNESCO, 1980.

Παραπομπή MLA

Sharma ,C D & Vyas ,Kailas. Handbook for Information Systems and Services. UNESCO, 1980.