Upjohn, R., & Ruffin, M. H. (1997). Internet resources for economic educators. National Council on Economic Education Center for Civil Society International.
Lua i Stíl Chicago (17ú heag.)Upjohn, Richard, agus M. Holt Ruffin. Internet Resources for Economic Educators. [New York], [Seattle, Washignton]: National Council on Economic Education Center for Civil Society International, 1997.
Lua MLA (9ú heag.)Upjohn, Richard, agus M. Holt Ruffin. Internet Resources for Economic Educators. National Council on Economic Education Center for Civil Society International, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.