Umporn Siriboonma. (1978). An analysis of student satisfaction as perceived by foreign students at Iowa State University. Iowa State University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Umporn Siriboonma. An Analysis of Student Satisfaction as Perceived by Foreign Students at Iowa State University. Ames: Iowa State University Press, 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Umporn Siriboonma. An Analysis of Student Satisfaction as Perceived by Foreign Students at Iowa State University. Iowa State University Press, 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.