Hoffmann, L. D., & Bradley, G. L. (2007). Calculus: For business, economics, and the social and life sciences (brief 9th ed.). McGraw Hill Higher Education.
Lua i Stíl Chicago (17ú heag.)Hoffmann, Laurence D.,|d1943-, agus Gerald L. Bradley. Calculus: For Business, Economics, and the Social and Life Sciences. brief 9th ed. Boston: McGraw Hill Higher Education, 2007.
Lua MLA (9ú heag.)Hoffmann, Laurence D.,|d1943-, agus Gerald L. Bradley. Calculus: For Business, Economics, and the Social and Life Sciences. brief 9th ed. McGraw Hill Higher Education, 2007.
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