Citazione Stile APA (7a Edizione)

Bos, N. (2018). Singing 101: Vocal basics and fundamental singing skills for all styles and abilities (Revised edition.). StudioBos.

Citazione stile Chigago Style (17a edizione)

Bos, Nancy. Singing 101: Vocal Basics and Fundamental Singing Skills for All Styles and Abilities. Revised edition. [Place of publication not identified]: StudioBos, 2018.

Citatione MLA (9a ed.)

Bos, Nancy. Singing 101: Vocal Basics and Fundamental Singing Skills for All Styles and Abilities. Revised edition. StudioBos, 2018.