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