Bartle, G. A. (1991). International directory of music education: Details of higher music and music educations and music education qualifications. C.I.R.C.M.E. The University of Western Australia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Bartle, Graham A. International Directory of Music Education: Details of Higher Music and Music Educations and Music Education Qualifications. C.I.R.C.M.E. The University of Western Australia, 1991.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Bartle, Graham A. International Directory of Music Education: Details of Higher Music and Music Educations and Music Education Qualifications. C.I.R.C.M.E. The University of Western Australia, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.