Cook, R. C. (1951). Human fertility: The modern dilemma. New York: William Sloane Associates Publishers.
शिकागो स्टाइल उद्धरणCook, Robert C. Human Fertility: The Modern Dilemma. New York: William Sloane Associates Publishers, 1951.
एमएलए उद्धरणCook, Robert C. Human Fertility: The Modern Dilemma. New York: William Sloane Associates Publishers, 1951.
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