APA (7th ed.) Zitazioa
Feldman, R. S. (2003). Development across the life span (3ed.). Prentice Halll.
Chicago Style (17th ed.) Zitazioa
Feldman, Robert. S. Development Across the Life Span. 3ed. Upper Saddle River: Prentice Halll, 2003.
MLA (9th ed.) Zitazioa
Feldman, Robert. S. Development Across the Life Span. 3ed. Prentice Halll, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.