Παραπομπή APA

Smith, D. P. (1992). Formal demography. New York, NY [u.a.].

Παραπομπή Chicago Style

Smith, David P. Formal Demography. New York, NY [u.a.], 1992.

Παραπομπή MLA

Smith, David P. Formal Demography. New York, NY [u.a.], 1992.