Ridley-Duff, R., & Bull, M. (2011). Understanding social enterprise: Theory & practice. SAGE.
Lua i Stíl Chicago (17ú heag.)Ridley-Duff, Rory, agus Mike Bull. Understanding Social Enterprise: Theory & Practice. London ; Thousand Oaks, Calif.: SAGE, 2011.
Lua MLA (8ú heag.)Ridley-Duff, Rory, agus Mike Bull. Understanding Social Enterprise: Theory & Practice. SAGE, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.