Cita APA (7th ed.)

Purcell, E. J., & Varberg, D. E. (1984). Calculus with analytic geometry (4th ed.). Prentice-Hall.

Cita Chicago (17th ed.)

Purcell, Edwin J., i Dale E. Varberg. Calculus with Analytic Geometry. 4th ed. Englewood Cliffs, N.J: Prentice-Hall, 1984.

Cita MLA (9th ed.)

Purcell, Edwin J., i Dale E. Varberg. Calculus with Analytic Geometry. 4th ed. Prentice-Hall, 1984.