APA (7e ed.) Bronvermelding

Perpillou, A. V. (1966). Human geography. Longmans.

Chicago (17e ed.) Bronvermelding

Perpillou, Aimé Vincent. Human Geography. Gran Bretaña: Longmans, 1966.

MLA (9e ed.) Bronvermelding

Perpillou, Aimé Vincent. Human Geography. Longmans, 1966.