Barr, R. D. (2013). Building a culture of hope: Enriching schools with optimism and opportunity. Solution Tree Press.
Lua i Stíl Chicago (17ú heag.)Barr, Robert D. Building a Culture of Hope: Enriching Schools with Optimism and Opportunity. Bloomington, Ind.: Solution Tree Press, 2013.
Lua MLA (9ú heag.)Barr, Robert D. Building a Culture of Hope: Enriching Schools with Optimism and Opportunity. Solution Tree Press, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.