Robert, H. D. M. (2010). Entrepreneurship (2nd ed.). SAGE.
Chicago Style aipamenaRobert, Hisrich D; Michael. Entrepreneurship. 2nd ed. New Delhi: SAGE, 2010.
MLA aipamenaRobert, Hisrich D; Michael. Entrepreneurship. 2nd ed. SAGE, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.