APA (7e ed.) Bronvermelding

Kettl, D. F. (2007). System under stress: Homeland security and American politics (Second Edition.). CQ Press.

Chicago (17e ed.) Bronvermelding

Kettl, Donald F. System Under Stress: Homeland Security and American Politics. Second Edition. Washington, D.C: CQ Press, 2007.

MLA (9e ed.) Bronvermelding

Kettl, Donald F. System Under Stress: Homeland Security and American Politics. Second Edition. CQ Press, 2007.