Smith, R. K. (1992). Investments. West Publishing Company.
Lua i Stíl Chicago (17ú heag.)Smith, Richard K. Investments. New York: West Publishing Company, 1992.
Lua MLA (9ú heag.)Smith, Richard K. Investments. West Publishing Company, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.