Wilkinson, R. G. (1973). Poverty and progress: An ecological model of economic development. London: Methuen.
शिकागो स्टाइल उद्धरणWilkinson, Richard G. Poverty and Progress: An Ecological Model of Economic Development. London: Methuen, 1973.
एमएलए उद्धरणWilkinson, Richard G. Poverty and Progress: An Ecological Model of Economic Development. London: Methuen, 1973.
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