Wiora, W. the Origins of German spiritual folk song. Ethnomusicology : journal of the Society for Ethnomusicology.
Chicago Style aipamenaWiora, Walter. "The Origins of German Spiritual Folk Song." Ethnomusicology : Journal of the Society for Ethnomusicology .
MLA aipamenaWiora, Walter. "The Origins of German Spiritual Folk Song." Ethnomusicology : Journal of the Society for Ethnomusicology, .
Kontuz: berrikusi erreferentzia hauek erabili aurretik.