Appelman, D. R. (1986). The science of vocal pedagogy: Theory and application (1st Midland book ed.). Indiana University Press.
Chicago-referens (17:e uppl.)Appelman, D. Ralph. The Science of Vocal Pedagogy: Theory and Application. 1st Midland book ed. Bloomington: Indiana University Press, 1986.
MLA-referens (9:e uppl.)Appelman, D. Ralph. The Science of Vocal Pedagogy: Theory and Application. 1st Midland book ed. Indiana University Press, 1986.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.