APA (7th ed.) Zitazioa
Langohr, H. M., & Langohr, P. T. (2008). The rating agencies and their credit ratings: What they are, how they work and why they are relevant. John Wiley.
Chicago Style (17th ed.) Zitazioa
Langohr, Herwig M., eta Patricia T. Langohr. The Rating Agencies and Their Credit Ratings: What They Are, How They Work and Why They Are Relevant. Chichester, West Sussex, England ; Hoboken, NJ: John Wiley, 2008.
MLA (9th ed.) Zitazioa
Langohr, Herwig M., eta Patricia T. Langohr. The Rating Agencies and Their Credit Ratings: What They Are, How They Work and Why They Are Relevant. John Wiley, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.