APA (7th ed.) Citation

United States. National Aeronautical Charting Office. (2010). Helicopter route chart, Chicago (6th ed., effective 21 Oct. 2010.). U.S. Dept. of Transportation, Federal Aviation Administration, National Aeronautical Charting Office.

Chicago Style (17th ed.) Citation

United States. National Aeronautical Charting Office. Helicopter Route Chart, Chicago. 6th ed., effective 21 Oct. 2010. Washington, D.C.: U.S. Dept. of Transportation, Federal Aviation Administration, National Aeronautical Charting Office, 2010.

MLA (8th ed.) Citation

United States. National Aeronautical Charting Office. Helicopter Route Chart, Chicago. 6th ed., effective 21 Oct. 2010. U.S. Dept. of Transportation, Federal Aviation Administration, National Aeronautical Charting Office, 2010.

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