Não informado. (1989). Small business economics. Kluwer Academic Publishers.
Lua i Stíl Chicago (17ú heag.)Não informado. Small Business Economics. Dordrecht, Holanda: Kluwer Academic Publishers, 1989.
Lua MLA (8ú heag.)Não informado. Small Business Economics. Kluwer Academic Publishers, 1989.
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