Wilkes, F. M. (1977). Capital budgeting techniques. Wiley.
Lua i Stíl Chicago (17ú heag.)Wilkes, F. M. Capital Budgeting Techniques. London ; New York: Wiley, 1977.
Lua MLA (8ú heag.)Wilkes, F. M. Capital Budgeting Techniques. Wiley, 1977.
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