Balling, M. (1970) “William F. Sharpe : Portfolio theory and capital markets. New York: McGraw-Hill, 1970. 316 pp. Pris: Kr. 152,50”., Nationaløkonomisk Tidsskrift, 108. Tilgængelig hos: https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/61447 (Set: 5 december 2025).