APA (7th ed.) Citation

Spencer, J. (1949). Operation and care of circular-scale instruments. Instruments Pub. Co..

Chicago Style (17th ed.) Citation

Spencer, James. Operation and Care of Circular-scale Instruments. Pittsburgh: Instruments Pub. Co., 1949.

MLA (9th ed.) Citation

Spencer, James. Operation and Care of Circular-scale Instruments. Instruments Pub. Co., 1949.

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