APA (7th ed.) Citation

United States. Bureau of Standards. (1919). Bureau of Standards certificate for ship watch. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Bureau of Standards. Bureau of Standards Certificate for Ship Watch. Washington, D.C.: [publisher not identified], 1919.

MLA (9th ed.) Citation

United States. Bureau of Standards. Bureau of Standards Certificate for Ship Watch. [publisher not identified], 1919.

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