American Psychological Association
Coombs, Philip H ( 1969 ). World Educational Crisis a Systems Analysis ( 00 ed. ). Oxford University Press.
Modern Language Association
Coombs, Philip H. World Educational Crisis a Systems Analysis . Oxford University Press. 1969
Chicago Citation
Coombs, Philip H. World Educational Crisis a Systems Analysis . 00 .New York
: Oxford University Press, 1969.
American Medical Association
Coombs, Philip H. World Educational Crisis a Systems Analysis . Oxford University Press; 1969.
