Vennard, W. (1968). Singing: The mechanism and the technic / by William Vennard (Rev. ed., greatly enlarged, 5. ed.). Fischer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVennard, William. Singing: The Mechanism and the Technic / by William Vennard. Rev. ed., greatly enlarged, 5. ed. New York, NY [u.a.]: Fischer, 1968.
एमएलए (8वां संस्करण) प्रशस्ति पत्रVennard, William. Singing: The Mechanism and the Technic / by William Vennard. Rev. ed., greatly enlarged, 5. ed. Fischer, 1968.
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