WILKES, F. M. (1983). Capital Budgeting Techniques F. M. Wilkes. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)WILKES, F. M. Capital Budgeting Techniques F. M. Wilkes. John Wiley & Sons, 1983.
Lua MLA (8ú heag.)WILKES, F. M. Capital Budgeting Techniques F. M. Wilkes. John Wiley & Sons, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.