National Association of Teachers of Singing (U.S.). (1995). Journal of singing: The official journal of the National Association of Teachers of Singing. National Association of Teachers of Singing.
Chicago-referens (17:e uppl.)National Association of Teachers of Singing (U.S.). Journal of Singing: The Official Journal of the National Association of Teachers of Singing. Jacksonville, FL: National Association of Teachers of Singing, 1995.
MLA-referens (9:e uppl.)National Association of Teachers of Singing (U.S.). Journal of Singing: The Official Journal of the National Association of Teachers of Singing. National Association of Teachers of Singing, 1995.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.