SpringerLink (Online service), Moos, L., Johansson, O., & Day, C. (2011). How school principals sustain success over time: International perspectives. Springer Netherlands.
Citazione stile Chigago Style (17a edizione)SpringerLink (Online service), Lejf Moos, Olof Johansson, e Christopher Day. How School Principals Sustain Success over Time: International Perspectives. Dordrecht: Springer Netherlands, 2011.
Citatione MLA (9a ed.)SpringerLink (Online service), et al. How School Principals Sustain Success over Time: International Perspectives. Springer Netherlands, 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.