Epperson, G. (1967). The musical symbol: A study of the philosophic theory of music ([1st ed.].). Iowa State University Press.
Chicago-referens (17:e uppl.)Epperson, Gordon. The Musical Symbol: A Study of the Philosophic Theory of Music. [1st ed.]. Ames: Iowa State University Press, 1967.
MLA-referens (8:e uppl.)Epperson, Gordon. The Musical Symbol: A Study of the Philosophic Theory of Music. [1st ed.]. Iowa State University Press, 1967.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.