Gaya APA

Butterworth, Anna. (1999). Harmony in Practice (1). : Associated Board.

Gaya Chicago

Butterworth, Anna. Harmony in Practice. 1 : Associated Board, 1999. Non Fiction.

Gaya MLA

Butterworth, Anna. Harmony in Practice. 1 : Associated Board, 1999. Non Fiction.

Gaya Turabian

Butterworth, Anna. Harmony in Practice. 1 : Associated Board, 1999. Non Fiction.