APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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