APA (7th ed.) Citation

Apel, W. (1949). The notation of polyphonic music 900-1600 (4. ed., rev. and with commentary.). <<The>> Medieval Academy of America.

Chicago Style (17th ed.) Citation

Apel, Willi. The Notation of Polyphonic Music 900-1600. 4. ed., rev. and with commentary. Cambridge, Mass: <<The>> Medieval Academy of America, 1949.

MLA (9th ed.) Citation

Apel, Willi. The Notation of Polyphonic Music 900-1600. 4. ed., rev. and with commentary. <<The>> Medieval Academy of America, 1949.