HEINTZELMAN, O. H., & HIGHSMITH, R. M. (1963). World regional geography.--Ed.2. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)HEINTZELMAN, Oliver H., agus Richard M. HIGHSMITH. World Regional Geography.--Ed.2. New Jersey: Prentice-Hall, 1963.
Lua MLA (9ú heag.)HEINTZELMAN, Oliver H., agus Richard M. HIGHSMITH. World Regional Geography.--Ed.2. Prentice-Hall, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.