Desmond, A. (1963). How Many People Have Ever Lived on Earth?
Chicago-Zitierstil (17. Ausg.)Desmond, Annabelle. How Many People Have Ever Lived on Earth? Washington, D.C, 1963.
MLA-Zitierstil (8. Ausg.)Desmond, Annabelle. How Many People Have Ever Lived on Earth? 1963.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.