Ferri, R. A. (2011). The Power of Passive Investing. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Ferri, Richard A. The Power of Passive Investing. Hoboken: John Wiley & Sons, 2011.
Lua MLA (9ú heag.)Ferri, Richard A. The Power of Passive Investing. John Wiley & Sons, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.