Cita APA

Keyfitz, N., & Keyfitz, N. (1968). Introduction to the mathematics of population. Reading, Mass.: Addison-Wesley.

Citación estilo Chicago

Keyfitz, Nathan, y Nathan Keyfitz. Introduction to the Mathematics of Population. Reading, Mass.: Addison-Wesley, 1968.

Cita MLA

Keyfitz, Nathan, y Nathan Keyfitz. Introduction to the Mathematics of Population. Reading, Mass.: Addison-Wesley, 1968.