Howard, D. M., Nix, J., & Welch, G. (2020). The Oxford handbook of singing. Oxford University Press.
Chicago Style (17th ed.) ZitazioaHoward, David M., John Nix, eta Graham Welch. The Oxford Handbook of Singing. Oxford, England: Oxford University Press, 2020.
MLA (9th ed.) ZitazioaHoward, David M., et al. The Oxford Handbook of Singing. Oxford University Press, 2020.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.