Upjohn, R., & Ruffin, M. H. (1997). Internet resources for economic educators. National Council on Economic Education Center for Civil Society International.
Citazione stile Chigago Style (17a edizione)Upjohn, Richard, e M. Holt Ruffin. Internet Resources for Economic Educators. [New York], [Seattle, Washignton]: National Council on Economic Education Center for Civil Society International, 1997.
Citatione MLA (9a ed.)Upjohn, Richard, e M. Holt Ruffin. Internet Resources for Economic Educators. National Council on Economic Education Center for Civil Society International, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.