OKUN, A. M. (1971). Brokings Papers On Economic Activity Arthur M. Okun And George L. Perry. The Brookings Institution.
Lua i Stíl Chicago (17ú heag.)OKUN, Arthur M. Brokings Papers On Economic Activity Arthur M. Okun And George L. Perry. The Brookings Institution, 1971.
Lua MLA (8ú heag.)OKUN, Arthur M. Brokings Papers On Economic Activity Arthur M. Okun And George L. Perry. The Brookings Institution, 1971.
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