Cita APA (7a ed.)
Pifer, S., & O'Hanlon, M. E. (2012). The opportunity: Next steps in reducing nuclear arms. Brookings Institution Press.
Cita Chicago Style (17a ed.)
Pifer, Steven, y Michael E. O'Hanlon. The Opportunity: Next Steps in Reducing Nuclear Arms. Washington, D.C.: Brookings Institution Press, 2012.
Cita MLA (9a ed.)
Pifer, Steven, y Michael E. O'Hanlon. The Opportunity: Next Steps in Reducing Nuclear Arms. Brookings Institution Press, 2012.
Precaución: Estas citas no son 100% exactas.