PURCELL, E. J. (1984). Calculus With Analytic Geometry Edwin J. Purcell And Dale Varberg. Englewood Cliffs.
Lua i Stíl Chicago (17ú heag.)PURCELL, Edwin J. Calculus With Analytic Geometry Edwin J. Purcell And Dale Varberg. Englewood Cliffs, 1984.
Lua MLA (8ú heag.)PURCELL, Edwin J. Calculus With Analytic Geometry Edwin J. Purcell And Dale Varberg. Englewood Cliffs, 1984.
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