Fernandez, R. (1983). Excess Profits. Addison-Wesly.
Lua i Stíl Chicago (17ú heag.)Fernandez, Ronald. Excess Profits. Addison-Wesly, 1983.
Lua MLA (8ú heag.)Fernandez, Ronald. Excess Profits. Addison-Wesly, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.