APA (7th ed.) Citation

Desmond, A. (1963). How Many People Have Ever Lived on Earth?

Chicago Style (17th ed.) Citation

Desmond, Annabelle. How Many People Have Ever Lived on Earth? Washington, D.C, 1963.

MLA (8th ed.) Citation

Desmond, Annabelle. How Many People Have Ever Lived on Earth? 1963.