Winardi, J. (2003). Entrepreneur dan entrepreneurship. Kencana.
Lua i Stíl Chicago (17ú heag.)Winardi, J. Entrepreneur Dan Entrepreneurship. Kencana, 2003.
Lua MLA (8ú heag.)Winardi, J. Entrepreneur Dan Entrepreneurship. Kencana, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.