APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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