Cita APA (7a ed.)

Ridge, T. J., & Bloom, L. (2009). The test of our times: America under siege __ and how we can be safe again. Thomas Dunne Books.

Cita Chicago Style (17a ed.)

Ridge, Thomas J., y Lary Bloom. The Test of Our Times: America Under Siege __ and How We Can Be Safe Again. New York: Thomas Dunne Books, 2009.

Cita MLA (9a ed.)

Ridge, Thomas J., y Lary Bloom. The Test of Our Times: America Under Siege __ and How We Can Be Safe Again. Thomas Dunne Books, 2009.