Cita APA

Apel, W. 1., & Apel, W. 1. (1961). The Notation of Polyphonic music, 900-1600 (5. edition.). Cambridge, Mass.

Citación estilo Chicago

Apel, Willi 1893-1988, y Willi 1893-1988 Apel. The Notation of Polyphonic Music, 900-1600. 5. edition. Cambridge, Mass, 1961.

Cita MLA

Apel, Willi 1893-1988, y Willi 1893-1988 Apel. The Notation of Polyphonic Music, 900-1600. 5. edition. Cambridge, Mass, 1961.