Nelson, S. M. (1980). Tetratunes for Violin - Viola - Cello: Teacher's book with accompaniments / by Sheila M. Nelson. Boosey & Hawkes.
Chicago-Zitierstil (17. Ausg.)Nelson, Sheila M. Tetratunes for Violin - Viola - Cello: Teacher's Book with Accompaniments / by Sheila M. Nelson. London: Boosey & Hawkes, 1980.
MLA-Zitierstil (8. Ausg.)Nelson, Sheila M. Tetratunes for Violin - Viola - Cello: Teacher's Book with Accompaniments / by Sheila M. Nelson. Boosey & Hawkes, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.