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Ukuran pendapatan dan keluaran negara

Christian Leipert (March, 1987) "A Critical Appraisal of Gross National Product: The Measurement of Net National Welfare and Environmental Accounting". Journal of Economic Issues, Vol. 21, No. 1, pp. 357-373

England, RW "Alternatives to Gross National Product: A Critical Survey", in Human Wellbeing and Economic Goals'' (Island Press, 1998)