Purcell, E. J. (1978). Calculus with analytic geometry (3rd ed.). Prentice-Hall.
Cita Chicago (17th ed.)Purcell, Edwin J. Calculus with Analytic Geometry. 3rd ed. Englewood Cliffs, N.J: Prentice-Hall, 1978.
Cita MLA (9th ed.)Purcell, Edwin J. Calculus with Analytic Geometry. 3rd ed. Prentice-Hall, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.