Barnett, R. A., & Ziegler, M. R. (1991). Applied calculus for business, economics, life sciences, and social sciences (4th ed.). Dellen Pub. Co.
Lua i Stíl Chicago (17ú heag.)Barnett, Raymond A., agus Michael R. Ziegler. Applied Calculus for Business, Economics, Life Sciences, and Social Sciences. 4th ed. San Francisco: Dellen Pub. Co, 1991.
Lua MLA (9ú heag.)Barnett, Raymond A., agus Michael R. Ziegler. Applied Calculus for Business, Economics, Life Sciences, and Social Sciences. 4th ed. Dellen Pub. Co, 1991.
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