APA (7th ed.) Citation

Willemssen, J. C. (2001). Critical infrastructure protection: Significant challenges in protecting federal systems and developing analysis and warning capabilities. U.S. General Accounting Office.

Chicago Style (17th ed.) Citation

Willemssen, Joel C. Critical Infrastructure Protection: Significant Challenges in Protecting Federal Systems and Developing Analysis and Warning Capabilities. [Washington, D.C.]: U.S. General Accounting Office, 2001.

MLA (9th ed.) Citation

Willemssen, Joel C. Critical Infrastructure Protection: Significant Challenges in Protecting Federal Systems and Developing Analysis and Warning Capabilities. U.S. General Accounting Office, 2001.