Abbott, Lynn «Play That Barber Shop Chord: A Case for the African American Origin of Barbershop Harmony». American Music. University of Illinois Press, 10, 3, 1992, pàg. 289–325. DOI: 10.2307/3051597. JSTOR: 3051597.
jstor.org
Abbott, Lynn «Play That Barber Shop Chord: A Case for the African American Origin of Barbershop Harmony». American Music. University of Illinois Press, 10, 3, 1992, pàg. 289–325. DOI: 10.2307/3051597. JSTOR: 3051597.