APA (7th ed.) Citation

Apel, W. (1953). The notation of polyphonic music, 900-1600 (5th ed. rev. and with commentary.). The Mediaeval Academy of America.

Chicago Style (17th ed.) Citation

Apel, Willi. The Notation of Polyphonic Music, 900-1600. 5th ed. rev. and with commentary. Cambridge (Massachusetts): The Mediaeval Academy of America, 1953.

MLA (9th ed.) Citation

Apel, Willi. The Notation of Polyphonic Music, 900-1600. 5th ed. rev. and with commentary. The Mediaeval Academy of America, 1953.