Cita APA (7a ed.)

Heintzelman, O. H. (1967). World regional geography. Prentice-Hall.

Cita Chicago Style (17a ed.)

Heintzelman, Oliver Harry. World Regional Geography. New Jersey: Prentice-Hall, 1967.

Cita MLA (9a ed.)

Heintzelman, Oliver Harry. World Regional Geography. Prentice-Hall, 1967.