Stevens, W. H. S. (1917). Unfair competition ; a study of certain practices, with some reference to the trust problem in the United States of America. The University of Chicago Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Stevens, William Harrison Spring. Unfair Competition ; a Study of Certain Practices, with Some Reference to the Trust Problem in the United States of America. Chicago, Ill: The University of Chicago Press, 1917.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Stevens, William Harrison Spring. Unfair Competition ; a Study of Certain Practices, with Some Reference to the Trust Problem in the United States of America. The University of Chicago Press, 1917.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.