Warwick-Ching, T. (1993). The International Gold Trade. ELSEVIER.
Lua i Stíl Chicago (17ú heag.)Warwick-Ching, Tony. The International Gold Trade. ELSEVIER, 1993.
Lua MLA (8ú heag.)Warwick-Ching, Tony. The International Gold Trade. ELSEVIER, 1993.
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