Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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