HANSON, J. (1968). A Textbook Of Economics J.l Hanson. McDonald & Evans.
Lua i Stíl Chicago (17ú heag.)HANSON, J.L. A Textbook Of Economics J.l Hanson. McDonald & Evans, 1968.
Lua MLA (8ú heag.)HANSON, J.L. A Textbook Of Economics J.l Hanson. McDonald & Evans, 1968.
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