APA (7th ed.) Zitazioa
Boyd, D. R. (2006). Lifespan development (4th ed.). Pearson.
Chicago Style (17th ed.) Zitazioa
Boyd, Denise Roberts. Lifespan Development. 4th ed. Boston: Pearson, 2006.
MLA (9th ed.) Zitazioa
Boyd, Denise Roberts. Lifespan Development. 4th ed. Pearson, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.