APA (7 वां संस्करण) प्रशस्ति पत्र
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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Langohr, Herwig M., और 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.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Langohr, Herwig M., और Patricia T. Langohr. The Rating Agencies and Their Credit Ratings: What They Are, How They Work and Why They Are Relevant. John Wiley, 2008.
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