Worcester, D. A. (1969). The optimal employment level, the negative income tax and an alternative suggestion. Institute of Economic Development and Research, University of the Philippines.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিWorcester, Dean Amory. The Optimal Employment Level, the Negative Income Tax and an Alternative Suggestion. [Quezon City]: Institute of Economic Development and Research, University of the Philippines, 1969.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিWorcester, Dean Amory. The Optimal Employment Level, the Negative Income Tax and an Alternative Suggestion. Institute of Economic Development and Research, University of the Philippines, 1969.
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