APA (7th ed.) Citation

Malthus, T. R. (1973). An essay on the principle of population / by T.R. Malthus. Dent.

Chicago Style (17th ed.) Citation

Malthus, T. R. An Essay on the Principle of Population / by T.R. Malthus. Dent, 1973.

MLA (9th ed.) Citation

Malthus, T. R. An Essay on the Principle of Population / by T.R. Malthus. Dent, 1973.

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