Παραπομπή APA

(1978). Directory of United Nations information systems and services. Geneva: Inter-Organization Board for Information Systems.

Παραπομπή Chicago Style

Directory of United Nations Information Systems and Services. Geneva: Inter-Organization Board for Information Systems, 1978.

Παραπομπή MLA

Directory of United Nations Information Systems and Services. Geneva: Inter-Organization Board for Information Systems, 1978.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.