Godfrey, R. R., & York, D. L. (1994). Higher bond yields: The triple-A advantage of insured municipal bonds. Irwin.
Lua i Stíl Chicago (17ú heag.)Godfrey, Robert R., agus Diana L. York. Higher Bond Yields: The Triple-A Advantage of Insured Municipal Bonds. Burr Ridge, Ill: Irwin, 1994.
Lua MLA (9ú heag.)Godfrey, Robert R., agus Diana L. York. Higher Bond Yields: The Triple-A Advantage of Insured Municipal Bonds. Irwin, 1994.
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