APA استشهاد

Berelson, B. (1969). Population: Challenging World Crisis. Voice of America.

استشهاد بنمط شيكاغو

Berelson, Bernard. Population: Challenging World Crisis. Washington: Voice of America, 1969.

MLA استشهاد

Berelson, Bernard. Population: Challenging World Crisis. Voice of America, 1969.