APA (7th ed.) Zitazioa
Gray, D. (2006). Calculate with confidence (4th ed.). Mosby.
Chicago Style (17th ed.) Zitazioa
Gray, Deborah. Calculate with Confidence. 4th ed. St. Louis, Mo.: Mosby, 2006.
MLA (9th ed.) Zitazioa
Gray, Deborah. Calculate with Confidence. 4th ed. Mosby, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.