APA (7e ed.) Bronvermelding

Snyder, J. P. (1987). Map projections: A working manual. U.S. G.P.O.

Chicago (17e ed.) Bronvermelding

Snyder, John Parr. Map Projections: A Working Manual. Washington, D. C: U.S. G.P.O, 1987.

MLA (9e ed.) Bronvermelding

Snyder, John Parr. Map Projections: A Working Manual. U.S. G.P.O, 1987.