Durrel, C. (1936). Elementary Calculus. G. Bell & Sons Ltd.
Cita Chicago (17th ed.)Durrel, C. Elementary Calculus. London: G. Bell & Sons Ltd, 1936.
Cita MLA (9th ed.)Durrel, C. Elementary Calculus. G. Bell & Sons Ltd, 1936.
Atenció: Aquestes cites poden no estar 100% correctes.