Purcell, E. J., & Varberg, D. E. (1984). Calculus with analytic geometry. NBS.
Lua i Stíl Chicago (17ú heag.)Purcell, Edwin J., agus Dale E. Varberg. Calculus with Analytic Geometry. Manila: NBS, 1984.
Lua MLA (9ú heag.)Purcell, Edwin J., agus Dale E. Varberg. Calculus with Analytic Geometry. NBS, 1984.
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