Deitz, J. E., & Southam, J. L. (2009). Contemporary business mathematics: For colleges (fifteenth edition.). South-Western Cengage Learning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Deitz, James E., و James L. Southam. Contemporary Business Mathematics: For Colleges. fifteenth edition. Mason, Ohio: South-Western Cengage Learning, 2009.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Deitz, James E., و James L. Southam. Contemporary Business Mathematics: For Colleges. fifteenth edition. South-Western Cengage Learning, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.