Roy, P., Waisanen, F. B., & Rogers, E. M. (1969). The impact of communication on rural development: An investigation in Costa Rica and India. UNESCO (Paris) and National Institute of Community Development.
Παραπομπή σε μορφή Chicago (17η εκδ.)Roy, Prodipto, Frederick B. Waisanen, και Everett M. Rogers. The Impact of Communication on Rural Development: An Investigation in Costa Rica and India. Hyderabad: UNESCO (Paris) and National Institute of Community Development, 1969.
Παραπομπή σε μορφή MLA (9th εκδ.)Roy, Prodipto, et al. The Impact of Communication on Rural Development: An Investigation in Costa Rica and India. UNESCO (Paris) and National Institute of Community Development, 1969.
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