APA Edition Citation

Malthus, T. R. (1970). An essay on the principle of population. Penguine Books.

Chicago Edition Citation

Malthus, Thomas Robert. An Essay on the Principle of Population. Harmondsworth: Penguine Books, 1970.

MLA Edition Citation

Malthus, Thomas Robert. An Essay on the Principle of Population. Penguine Books, 1970.

Warning: These citations may not always be 100% accurate.