Cita APA (7a ed.)

Ericson, E. L. (1985). The free mind through the ages. Frederick Ungar Publishing Co..

Cita Chicago Style (17a ed.)

Ericson, Edward L. The Free Mind Through the Ages. New York: Frederick Ungar Publishing Co., 1985.

Cita MLA (9a ed.)

Ericson, Edward L. The Free Mind Through the Ages. Frederick Ungar Publishing Co., 1985.