APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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