Cita APA (7th ed.)

Duckworth, W. (1998). A creative approach to music fundamentals (6th ed.). Wadsworth Pub.

Cita Chicago (17th ed.)

Duckworth, William. A Creative Approach to Music Fundamentals. 6th ed. Belmont, Calif: Wadsworth Pub, 1998.

Cita MLA (9th ed.)

Duckworth, William. A Creative Approach to Music Fundamentals. 6th ed. Wadsworth Pub, 1998.