TASSEL, R. C. V. Economic essntials#a core approach#Roger C. Van Tassel. Houghton Mifflin Company.
Lua i Stíl Chicago (17ú heag.)TASSEL, Roger C. Van. Economic Essntials#a Core Approach#Roger C. Van Tassel. Houghton Mifflin Company.
Lua MLA (8ú heag.)TASSEL, Roger C. Van. Economic Essntials#a Core Approach#Roger C. Van Tassel. Houghton Mifflin Company.
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