Παραπομπή APA

Agarwal, S. K., & Ansari, M. M. (1991). Directory of distance education institutions.

Παραπομπή Chicago Style

Agarwal, S K., και M M. Ansari. Directory of Distance Education Institutions. New Delhi, Association of Indian Universities, 1991.

Παραπομπή MLA

Agarwal, S K., και M M. Ansari. Directory of Distance Education Institutions. 1991.