Brooks, C. A., & Sims, R. (2015). Roland Hayes: The legacy of an American tenor. Indiana University Press.
Chicago-čujuhus (17. p.)Brooks, Christopher Antonio, juo Robert Sims. Roland Hayes: The Legacy of an American Tenor. Bloomington, Indiana: Indiana University Press, 2015.
MLA-čujuhus (9. p.)Brooks, Christopher Antonio, juo Robert Sims. Roland Hayes: The Legacy of an American Tenor. Indiana University Press, 2015.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.