Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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