APA (7th ed.) Citation

United States. Government Accountability Office & ProQuest (Firm). (2009). Defense travel system: Implementation challenges remain : report to congressional requesters. U.S. Govt. Accountability Office.

Chicago Style (17th ed.) Citation

United States. Government Accountability Office and ProQuest (Firm). Defense Travel System: Implementation Challenges Remain : Report to Congressional Requesters. [Washington, D.C.]: U.S. Govt. Accountability Office, 2009.

MLA (9th ed.) Citation

United States. Government Accountability Office and ProQuest (Firm). Defense Travel System: Implementation Challenges Remain : Report to Congressional Requesters. U.S. Govt. Accountability Office, 2009.

Warning: These citations may not always be 100% accurate.