Darst, D. M. (2013). Portfolio investment opportunities in precious metals. Wiley.
Lua i Stíl Chicago (17ú heag.)Darst, David M. Portfolio Investment Opportunities in Precious Metals. Hoboken, New Jersey: Wiley, 2013.
Lua MLA (9ú heag.)Darst, David M. Portfolio Investment Opportunities in Precious Metals. Wiley, 2013.
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