Bos, N. (2018). Singing 101: Vocal basics and fundamental singing skills for all styles and abilities (Revised edition.). StudioBos.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBos, Nancy. Singing 101: Vocal Basics and Fundamental Singing Skills for All Styles and Abilities. Revised edition. [Place of publication not identified]: StudioBos, 2018.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBos, Nancy. Singing 101: Vocal Basics and Fundamental Singing Skills for All Styles and Abilities. Revised edition. StudioBos, 2018.
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