Franklin

MLA

Foster, Harry D, S. H Ingberg, and Earl R Pinkston. Fire Resistance of Walls of Gravel-aggregate Concrete Masonry Units. Washington, D.C.: U.S. Dept. of Commerce, National Bureau of Standards , 1951.

APA

Foster, H. D, Ingberg, S. H, & Pinkston, E. R. (1951). Fire resistance of walls of gravel-aggregate concrete masonry units. Washington, D.C.: U.S. Dept. of Commerce, National Bureau of Standards .

Chicago

Foster, Harry D, S. H Ingberg, and Earl R Pinkston. Fire Resistance of Walls of Gravel-Aggregate Concrete Masonry Units. Washington, D.C.: U.S. Dept. of Commerce, National Bureau of Standards, 1951.