Campbell, C., & Collins, D. (2015). Entrepreneurial skill development. Delve Publishing LLC.
Lua i Stíl Chicago (17ú heag.)Campbell, Christopher, agus Daniel Collins. Entrepreneurial Skill Development. New York, N.Y: Delve Publishing LLC, 2015.
Lua MLA (9ú heag.)Campbell, Christopher, agus Daniel Collins. Entrepreneurial Skill Development. Delve Publishing LLC, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.