Citazione Stile APA (7a Edizione)

Wiora, W., & Norton, H. (1965). The four ages of music. W. W. Norton.

Citazione stile Chigago Style (17a edizione)

Wiora, Walter, e Herter Norton. The Four Ages of Music. New York: W. W. Norton, 1965.

Citatione MLA (9a ed.)

Wiora, Walter, e Herter Norton. The Four Ages of Music. W. W. Norton, 1965.