Birch, T. (1964). Maps: Topographical and statistical (2nd ed.). Clarendon Press.
Cita Chicago (17th ed.)Birch, T.W. Maps: Topographical and Statistical. 2nd ed. Oxford: Clarendon Press, 1964.
Cita MLA (9th ed.)Birch, T.W. Maps: Topographical and Statistical. 2nd ed. Clarendon Press, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.