Cita APA (7th ed.)

HEINTZELMAN, O. H., & HIGHSMITH, R. M. (1963). World regional geography.--Ed.2. Prentice-Hall.

Cita Chicago (17th ed.)

HEINTZELMAN, Oliver H., i Richard M. HIGHSMITH. World Regional Geography.--Ed.2. New Jersey: Prentice-Hall, 1963.

Cita MLA (9th ed.)

HEINTZELMAN, Oliver H., i Richard M. HIGHSMITH. World Regional Geography.--Ed.2. Prentice-Hall, 1963.