Frumkin, H. (2006). Safe and healthy school environments. Oxford University Press.
Chicago Style aipamenaFrumkin, Howard. Safe and Healthy School Environments. Oxford: Oxford University Press, 2006.
MLA aipamenaFrumkin, Howard. Safe and Healthy School Environments. Oxford University Press, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.