ELLS, H. S. (1958). Readings In The Theory Of International Trade Howard S. Ellis. George Allen and Unwin.
Lua i Stíl Chicago (17ú heag.)ELLS, Howard S. Readings In The Theory Of International Trade Howard S. Ellis. George Allen and Unwin, 1958.
Lua MLA (8ú heag.)ELLS, Howard S. Readings In The Theory Of International Trade Howard S. Ellis. George Allen and Unwin, 1958.
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