CLARK, J. J. (1989). Capital Budgeting. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)CLARK, John J. Capital Budgeting. Prentice-Hall, 1989.
Lua MLA (8ú heag.)CLARK, John J. Capital Budgeting. Prentice-Hall, 1989.
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