APA

Coombs P. H., International Conference on the World Crisis in Education, . (1968). The world educational crisis: a systems analysis. New York: Oxford University Press.

Chicago

Coombs Philip Hall, International Conference on the World Crisis in Education, . 1968. The world educational crisis: a systems analysis. New York: Oxford University Press.

Harvard

Coombs P. H., International Conference on the World Crisis in Education, . (1968). The world educational crisis: a systems analysis. New York: Oxford University Press.

MLA

Coombs Philip Hall, International Conference on the World Crisis in Education, . The world educational crisis: a systems analysis. New York: Oxford University Press. 1968.