APA (7th ed.) Citation

Cipolla, C. M. (1965). The economic history of world population. Penguin Books.

Chicago Style (17th ed.) Citation

Cipolla, Carlo M. The Economic History of World Population. Baltimore: Penguin Books, 1965.

MLA (9th ed.) Citation

Cipolla, Carlo M. The Economic History of World Population. Penguin Books, 1965.