Παραπομπή APA

Malthus, T. R., & Flew, A. (1970). An essay on the principle of population and A summary view of the principle of population. Harmondsworth: Penguin.

Παραπομπή Chicago Style

Malthus, Thomas Robert, and Antony Flew. An Essay On the Principle of Population and A Summary View of the Principle of Population. Harmondsworth: Penguin, 1970.

Παραπομπή MLA

Malthus, Thomas Robert, and Antony Flew. An Essay On the Principle of Population and A Summary View of the Principle of Population. Harmondsworth: Penguin, 1970.

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