APA (7th ed.) Citation

United States. Bureau of Standards. (1930). Standard time zones of U.S. and adjacent parts of Canada and Mexico, as of Apr. 1, 1930. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

United States. Bureau of Standards. Standard Time Zones of U.S. and Adjacent Parts of Canada and Mexico, as of Apr. 1, 1930. Washington, D.C.: U.S. Government Printing Office, 1930.

MLA (9th ed.) Citation

United States. Bureau of Standards. Standard Time Zones of U.S. and Adjacent Parts of Canada and Mexico, as of Apr. 1, 1930. U.S. Government Printing Office, 1930.