Williams. (2008). Essentials of contemporary business statistics. South-Western.
استشهاد بنمط شيكاغوWilliams. Essentials of Contemporary Business Statistics. South-Western, 2008.
MLA استشهادWilliams. Essentials of Contemporary Business Statistics. South-Western, 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.