Оригиналан: Schradieck, Henry. School of Violin Technics. Viola transcription. Schradieck, Henry. Viola. Lifschey, Samuel Publisher. New York.
Превод: Сцхрадиецк, Хенри. Сцхрадиецк, Хенри. Школа виолине технике. Љубичица. G. Schirmer, 1900 Copyright.