Upjohn, R., & Ruffin, M. H. (1997). Internet resources for economic educators. National Council on Economic Education Center for Civil Society International.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUpjohn, Richard, और M. Holt Ruffin. Internet Resources for Economic Educators. [New York], [Seattle, Washignton]: National Council on Economic Education Center for Civil Society International, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUpjohn, Richard, और M. Holt Ruffin. Internet Resources for Economic Educators. National Council on Economic Education Center for Civil Society International, 1997.
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