APA (7th ed.) Zitazioa

(1997). Handbell notation: Difficulty level system : solo and ensemble notation.

Chicago Style (17th ed.) Zitazioa

Handbell Notation: Difficulty Level System : Solo and Ensemble Notation. 1997.

MLA (9th ed.) Zitazioa

Handbell Notation: Difficulty Level System : Solo and Ensemble Notation. 1997.

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