Παραπομπή APA

Singh, Y. (1973). Key communicators of agricultural innovations. Satish book enterprise.

Παραπομπή Chicago Style

Singh, Y.P. Key Communicators of Agricultural Innovations. Agra: Satish book enterprise, 1973.

Παραπομπή MLA

Singh, Y.P. Key Communicators of Agricultural Innovations. Satish book enterprise, 1973.