Ritter, F. E., Baxter, G. D., & Churchill, E. F. Foundations for desgning user-centered systems: What system designers need to know about people.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ritter, Frank E., Gordon D. Baxter, و Elizabeth F. Churchill. Foundations for Desgning User-centered Systems: What System Designers Need to Know About People.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ritter, Frank E., et al. Foundations for Desgning User-centered Systems: What System Designers Need to Know About People.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.