APA استشهاد

Heintzelman, O. H., & Smith, R. M. . H. (1965). World regional geography/2nd ed (2nd ed.). Prentice hall.

استشهاد بنمط شيكاغو

Heintzelman, Oliver H., و R M High Smith. World Regional Geography/2nd Ed. 2nd ed. New delhi: Prentice hall, 1965.

MLA استشهاد

Heintzelman, Oliver H., و R M High Smith. World Regional Geography/2nd Ed. 2nd ed. Prentice hall, 1965.