APA استشهاد

Trewartha, G. T. (1969). A Geography Of Population: World Pattern. John Wieley & Sons.

استشهاد بنمط شيكاغو

Trewartha, Glenn T. A Geography Of Population: World Pattern. New York: John Wieley & Sons, 1969.

MLA استشهاد

Trewartha, Glenn T. A Geography Of Population: World Pattern. John Wieley & Sons, 1969.