APA (7th ed.) Zitazioa
Singh, N. R. (2012). Nursing: The ultimate study guide. Springer.
Chicago Style (17th ed.) Zitazioa
Singh, Nadia R. Nursing: The Ultimate Study Guide. New York: Springer, 2012.
MLA (9th ed.) Zitazioa
Singh, Nadia R. Nursing: The Ultimate Study Guide. Springer, 2012.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.