APA (7e ed.) Bronvermelding

Durell, C. (1966). Elementry geometry. G.Bell.

Chicago (17e ed.) Bronvermelding

Durell, C.V. Elementry Geometry. London: G.Bell, 1966.

MLA (9e ed.) Bronvermelding

Durell, C.V. Elementry Geometry. G.Bell, 1966.