SpringerLink (Online service), Moos, L., Johansson, O., & Day, C. (2011). How school principals sustain success over time: International perspectives. Springer Netherlands.
Lua i Stíl Chicago (17ú heag.)SpringerLink (Online service), Lejf Moos, Olof Johansson, agus Christopher Day. How School Principals Sustain Success over Time: International Perspectives. Dordrecht: Springer Netherlands, 2011.
Lua MLA (9ú heag.)SpringerLink (Online service), et al. How School Principals Sustain Success over Time: International Perspectives. Springer Netherlands, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.