Beach, D. I., & Ovens, G. (1972). Business and securities valuation. Methuen.
Lua i Stíl Chicago (17ú heag.)Beach, Donald I., agus Geo Ovens. Business and Securities Valuation. Toronto: Methuen, 1972.
Lua MLA (9ú heag.)Beach, Donald I., agus Geo Ovens. Business and Securities Valuation. Methuen, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.