APA (7e ed.) Bronvermelding

(1997). Fundamintals of the Physical environment. Routledge.

Chicago (17e ed.) Bronvermelding

Fundamintals of the Physical Environment. London: Routledge: Routledge, 1997.

MLA (9e ed.) Bronvermelding

Fundamintals of the Physical Environment. Routledge, 1997.