APA (7e ed.) Bronvermelding

Gopsill, G., & Bessley, F. (1964). Practical geography: Exercises with modles and improvised equipment. Macmillan.

Chicago (17e ed.) Bronvermelding

Gopsill, G.H, en Frank Bessley. Practical Geography: Exercises with Modles and Improvised Equipment. London: Macmillan, 1964.

MLA (9e ed.) Bronvermelding

Gopsill, G.H, en Frank Bessley. Practical Geography: Exercises with Modles and Improvised Equipment. Macmillan, 1964.