WINARDI. (2005). Entrepreneur dan Entrepreneurship Winardi. Prenada Media.
Lua i Stíl Chicago (17ú heag.)WINARDI. Entrepreneur Dan Entrepreneurship Winardi. Prenada Media, 2005.
Lua MLA (8ú heag.)WINARDI. Entrepreneur Dan Entrepreneurship Winardi. Prenada Media, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.