Johnson, D. J. (1997). Choral techniques: Beyond the basics : practical suggestions for choral conductors of school groups and community and church choirs. Neil A. Kjos Music.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Johnson, Deral J. Choral Techniques: Beyond the Basics : Practical Suggestions for Choral Conductors of School Groups and Community and Church Choirs. San Diego, Calif: Neil A. Kjos Music, 1997.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Johnson, Deral J. Choral Techniques: Beyond the Basics : Practical Suggestions for Choral Conductors of School Groups and Community and Church Choirs. Neil A. Kjos Music, 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.