Herbert,Giersch. (1989). Services in world economic growth: Symposium 1988. Westview.
Tohutoru Kātū Chicago (17th ed.)Herbert,Giersch. Services in World Economic Growth: Symposium 1988. Boulder: Westview, 1989.
Tohutoro MLA (9th ed.)Herbert,Giersch. Services in World Economic Growth: Symposium 1988. Westview, 1989.
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