Allen, William Duncan (Autumn 1973). "Musings of a Music Columnist". The Black Perspective in Music. 1 (2): 107–114. doi:10.2307/1214445. JSTOR1214445.
Smith 2002, citing Heyman 1992 as a general reference. Smith, Patricia Juliana (2002). "Barber, Samuel (1910–1981)". In Claude J. Summers (ed.). glbtq: An Encyclopedia of Gay, Lesbian, Bisexual, Transgender, and Queer Culture. Chicago: glbtq, Inc. Archived from the original on April 11, 2005. Heyman, Barbara B. (1992). Samuel Barber: The Composer and His Music. New York and Oxford: Oxford University Press. ISBN978-0-19-509058-1.
Allen, William Duncan (Autumn 1973). "Musings of a Music Columnist". The Black Perspective in Music. 1 (2): 107–114. doi:10.2307/1214445. JSTOR1214445.
Smith 2002, citing Heyman 1992 as a general reference. Smith, Patricia Juliana (2002). "Barber, Samuel (1910–1981)". In Claude J. Summers (ed.). glbtq: An Encyclopedia of Gay, Lesbian, Bisexual, Transgender, and Queer Culture. Chicago: glbtq, Inc. Archived from the original on April 11, 2005. Heyman, Barbara B. (1992). Samuel Barber: The Composer and His Music. New York and Oxford: Oxford University Press. ISBN978-0-19-509058-1.