APA (7e ed.) Bronvermelding

CHRISTENSON, R. M. (1982). Challenge and decision: Political issues of our time.--Ed.6. Harper and Row Pub.

Chicago (17e ed.) Bronvermelding

CHRISTENSON, Reo M. Challenge and Decision: Political Issues of Our Time.--Ed.6. New York: Harper and Row Pub, 1982.

MLA (9e ed.) Bronvermelding

CHRISTENSON, Reo M. Challenge and Decision: Political Issues of Our Time.--Ed.6. Harper and Row Pub, 1982.