Humberstone, J. (2013). Sibelius 7 music notation essentials. Cengage Learning.
Chicago-viite (17. p.)Humberstone, James. Sibelius 7 Music Notation Essentials. Boston: Cengage Learning, 2013.
MLA-viite (9. p.)Humberstone, James. Sibelius 7 Music Notation Essentials. Cengage Learning, 2013.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.