APA (7th ed.) Citation
Simpson, B. L. (1948). Development of the metal castings industry. [s.n.].
Chicago Style (17th ed.) Citation
Simpson, B. L. Development of the Metal Castings Industry. [s.l.]: [s.n.], 1948.
MLA (9th ed.) Citation
Simpson, B. L. Development of the Metal Castings Industry. [s.n.], 1948.
Warning: These citations may not always be 100% accurate.