Cita APA (7th ed.)

PERPILLOU, A. (1977). Human geography.-- ed.2. Longman Group.

Cita Chicago (17th ed.)

PERPILLOU, A.V. Human Geography.-- Ed.2. New York: Longman Group, 1977.

Cita MLA (9th ed.)

PERPILLOU, A.V. Human Geography.-- Ed.2. Longman Group, 1977.