APA (7th ed.) Citation

United States. Bureau of Standards. (1933). Concrete building units, second edition. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Standards. Concrete Building Units, Second Edition. [Washington]: [s.n.], 1933.

MLA (9th ed.) Citation

United States. Bureau of Standards. Concrete Building Units, Second Edition. [s.n.], 1933.

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