APA (7th ed.) Zitazioa
Brown, L. R., Kane, H., & Roodman, D. M. Vital Signs 1994: The Trends That Are Shaping Our Future. Norton.
Chicago Style (17th ed.) Zitazioa
Brown, Lester R., Hal Kane, eta David Malin Roodman. Vital Signs 1994: The Trends That Are Shaping Our Future. Nueva York, EUA: Norton.
MLA (9th ed.) Zitazioa
Brown, Lester R., et al. Vital Signs 1994: The Trends That Are Shaping Our Future. Norton.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.