APA (7th ed.) Citation

Hathcock, B. D., & Skillman, E. (1919). Tests of hollow building tiles. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Hathcock, Bernard D., and Edward Skillman. Tests of Hollow Building Tiles. [Washington?]: U.S. Government Printing Office, 1919.

MLA (9th ed.) Citation

Hathcock, Bernard D., and Edward Skillman. Tests of Hollow Building Tiles. U.S. Government Printing Office, 1919.