Symposium in Music Education ( 1981: University of Illinois at Urbana Champaign), Leonhard, C., & Colwell, R. (1982). Symposium in Music Education: A festschrift for Charles Leonhard. University of Illinois.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Symposium in Music Education ( 1981: University of Illinois at Urbana Champaign), Charles Leonhard, و Richard Colwell. Symposium in Music Education: A Festschrift for Charles Leonhard. Urbana, Ill: University of Illinois, 1982.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Symposium in Music Education ( 1981: University of Illinois at Urbana Champaign), et al. Symposium in Music Education: A Festschrift for Charles Leonhard. University of Illinois, 1982.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.