Dyfyniad APA

Malthus, T. R., & Gilbert, G. (2008). An essay on the principle of population. Oxford University Press.

Dyfyniad Arddull Chicago

Malthus, T. R., and Geoffrey Gilbert. An Essay on the Principle of Population. Oxford ; New York: Oxford University Press, 2008.

Dyfyniad MLA

Malthus, T. R., and Geoffrey Gilbert. An Essay on the Principle of Population. Oxford University Press, 2008.

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