RUGGLES, R. (1956). National Income Accounts And Income Analysis. Richard Ruggles And Nancy D. Ruggles. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)RUGGLES, Richard. National Income Accounts And Income Analysis. Richard Ruggles And Nancy D. Ruggles. McGraw-Hill, 1956.
Lua MLA (8ú heag.)RUGGLES, Richard. National Income Accounts And Income Analysis. Richard Ruggles And Nancy D. Ruggles. McGraw-Hill, 1956.
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