Cita APA (7a ed.)
Penney, D. E., & Edwards, C. (1990). Calculus and analytic geometry (3.ed.). Prentice Hall International.
Cita Chicago Style (17a ed.)
Penney, David E., y C.H.Jr Edwards. Calculus and Analytic Geometry. 3.ed. Englewood Cliffs: Prentice Hall International, 1990.
Cita MLA (9a ed.)
Penney, David E., y C.H.Jr Edwards. Calculus and Analytic Geometry. 3.ed. Prentice Hall International, 1990.
Precaución: Estas citas no son 100% exactas.