Παραπομπή σε μορφή APA (7η εκδ.)

Barr, R. D. (2013). Building a culture of hope: Enriching schools with optimism and opportunity. Solution Tree Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Barr, Robert D. Building a Culture of Hope: Enriching Schools with Optimism and Opportunity. Bloomington, Ind.: Solution Tree Press, 2013.

Παραπομπή σε μορφή MLA (9th εκδ.)

Barr, Robert D. Building a Culture of Hope: Enriching Schools with Optimism and Opportunity. Solution Tree Press, 2013.