Ying, L. C. (1991). Understanding of user perceptions of price, quality and value in the marketing of private telecommunications network services: Case study.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ying, Lai Chang. Understanding of User Perceptions of Price, Quality and Value in the Marketing of Private Telecommunications Network Services: Case Study. 1991.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ying, Lai Chang. Understanding of User Perceptions of Price, Quality and Value in the Marketing of Private Telecommunications Network Services: Case Study. 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.