APA (7th ed.) Citation

(1927). 1928 supplement to U.S. Government master specification for lamps, electric, incandescent, large, tungsten filament. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

1928 Supplement to U.S. Government Master Specification for Lamps, Electric, Incandescent, Large, Tungsten Filament. [Washington?]: U.S. Government Printing Office, 1927.

MLA (9th ed.) Citation

1928 Supplement to U.S. Government Master Specification for Lamps, Electric, Incandescent, Large, Tungsten Filament. U.S. Government Printing Office, 1927.