Ryan, T. M. (1978). Theory of portfolio selection. Macmillan.
Lua i Stíl Chicago (17ú heag.)Ryan, Terence M. Theory of Portfolio Selection. London: Macmillan, 1978.
Lua MLA (9ú heag.)Ryan, Terence M. Theory of Portfolio Selection. Macmillan, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.