Fox, K. A. (1968). Intermediate Economic Statistics Karl A. Fox. Wiley Eastern Private.
Lua i Stíl Chicago (17ú heag.)Fox, Karl A. Intermediate Economic Statistics Karl A. Fox. Wiley Eastern Private, 1968.
Lua MLA (8ú heag.)Fox, Karl A. Intermediate Economic Statistics Karl A. Fox. Wiley Eastern Private, 1968.
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