Aber, J. W. (1973). Beta coefficients and models of security return. Lexington Books.
Cita Chicago (17th ed.)Aber, John W. Beta Coefficients and Models of Security Return. Lexington, Mass: Lexington Books, 1973.
Cita MLA (9th ed.)Aber, John W. Beta Coefficients and Models of Security Return. Lexington Books, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.