Allen, F. B., Douglas, E. C., Richmond, D. E., Rickart, C. E., Swain, H., & Walker, R. J. (1961). Elementary functions: Student's text. Yale University Press.
Cita Chicago (17th ed.)Allen, Frank B., Edwin C. Douglas, Donald E. Richmond, Charles E. Rickart, Henry Swain, i Robert J. Walker. Elementary Functions: Student's Text. New Haven: Yale University Press, 1961.
Cita MLA (9th ed.)Allen, Frank B., et al. Elementary Functions: Student's Text. Yale University Press, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.