Frumkin, H. (2006). Safe and healthy school environments. Oxford University Press.
Chicago-referens (17:e uppl.)Frumkin, Howard. Safe and Healthy School Environments. Oxford: Oxford University Press, 2006.
MLA-referens (9:e uppl.)Frumkin, Howard. Safe and Healthy School Environments. Oxford University Press, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.