Widder, D. V. (2002). Advanced calculus (2nd ed.). Prentice-Hall.
Cita Chicago (17th ed.)Widder, David V. Advanced Calculus. 2nd ed. New Delhi: Prentice-Hall, 2002.
Cita MLA (9th ed.)Widder, David V. Advanced Calculus. 2nd ed. Prentice-Hall, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.