APA (7th ed.) Zitazioa
Barras, R. (2009). Building cycles: Growth & instability. Ames, Iowa : Wiley-Blackwell.
Chicago Style (17th ed.) Zitazioa
Barras, Richard. Building Cycles: Growth & Instability. Chichester, West Sussex, U.K.: Ames, Iowa : Wiley-Blackwell, 2009.
MLA (9th ed.) Zitazioa
Barras, Richard. Building Cycles: Growth & Instability. Ames, Iowa : Wiley-Blackwell, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.