Aber, J. W. (1973). Beta coefficients and models of security return. Lexington Books.
Lua i Stíl Chicago (17ú heag.)Aber, John W. Beta Coefficients and Models of Security Return. Lexington, Mass: Lexington Books, 1973.
Lua MLA (9ú heag.)Aber, John W. Beta Coefficients and Models of Security Return. Lexington Books, 1973.
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