Hoffmann, L. D., & Bradley, G. L. (2007). Calculus: For business, economics, and the social and life sciences (brief 9th ed.). McGraw Hill Higher Education.
芝加哥风格引文Hoffmann, Laurence D.,|d1943-, 与 Gerald L. Bradley. Calculus: For Business, Economics, and the Social and Life Sciences. brief 9th ed. Boston: McGraw Hill Higher Education, 2007.
MLA引文Hoffmann, Laurence D.,|d1943-, 与 Gerald L. Bradley. Calculus: For Business, Economics, and the Social and Life Sciences. brief 9th ed. McGraw Hill Higher Education, 2007.
警告：这些引文格式不一定是100％准确.