APA (7th ed.) Citation

Lansford, Covarrubias, & Pauly. (2006). To protect and defend: US homeland security policy.

Chicago Style (17th ed.) Citation

Lansford, Covarrubias, and Pauly. To Protect and Defend: US Homeland Security Policy. Aldershot, England, 2006.

MLA (8th ed.) Citation

Lansford, et al. To Protect and Defend: US Homeland Security Policy. 2006.