Gaya APA
Purcell, E, J., Varberg, D. (1987).
Calculus with analytic geometry (5).
United States of America:
Prentice Hall.
Gaya MLA
Purcell, Edwin, J.., Varberg, Dale.
"Calculus with analytic geometry".
5
United States of America:
Prentice Hall,
1987.
Text.