Siropolis, N. (1977). Small business management: A guide to entrepreneurship. Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)Siropolis, Nicholas. Small Business Management: A Guide to Entrepreneurship. Boston: Houghton Mifflin, 1977.
Lua MLA (9ú heag.)Siropolis, Nicholas. Small Business Management: A Guide to Entrepreneurship. Houghton Mifflin, 1977.
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