APA (7th ed.) Citation

United States. Flight Standards Service. Airmen knowledge test guides. U.S. Dept. of Transportation, Federal Aviation Administration, Flight Standards Service.

Chicago Style (17th ed.) Citation

United States. Flight Standards Service. Airmen Knowledge Test Guides. [Washington, D.C.]: U.S. Dept. of Transportation, Federal Aviation Administration, Flight Standards Service.

MLA (9th ed.) Citation

United States. Flight Standards Service. Airmen Knowledge Test Guides. U.S. Dept. of Transportation, Federal Aviation Administration, Flight Standards Service.