Cita APA (7th ed.)

Christenson, R. M. (1964). Challence and decision: Political issues of our time. Harper & Row.

Cita Chicago (17th ed.)

Christenson, Reo M. Challence and Decision: Political Issues of Our Time. Nueva York: Harper & Row, 1964.

Cita MLA (9th ed.)

Christenson, Reo M. Challence and Decision: Political Issues of Our Time. Harper & Row, 1964.