Gaya APA

Hoffmann, L, D., Bradley, G, L. (2007). Calculus for business, economics, and the social and life sciences (9th ed.). New York: McGraw Hill.

Gaya MLA

Hoffmann, Laurence, D.., Bradley, Gerald, L.. "Calculus for business, economics, and the social and life sciences". 9th ed. New York: McGraw Hill, 2007. Text.