Lawrence, S. J. (1978). Challenges in piano teaching: One to one lessons for the handicapped and others. Workshop music teaching.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Lawrence, Sidney J. Challenges in Piano Teaching: One to One Lessons for the Handicapped and Others. New York: Workshop music teaching, 1978.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Lawrence, Sidney J. Challenges in Piano Teaching: One to One Lessons for the Handicapped and Others. Workshop music teaching, 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.