Citazione Stile APA (7a Edizione)

KEYFITZ, N. (1968). Introduction to the mathematics of population; 2nd ed. Addison-Wesley.

Citazione stile Chigago Style (17a edizione)

KEYFITZ, Nathan. Introduction to the Mathematics of Population; 2nd Ed. Reading, Mass: Addison-Wesley, 1968.

Citatione MLA (9a ed.)

KEYFITZ, Nathan. Introduction to the Mathematics of Population; 2nd Ed. Addison-Wesley, 1968.