APA (7th ed.) Citation

Gray, A., & Wallace, G. A. (1947). Principles and practice of electrical engineering (6th ed., 2nd imp.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Gray, Alexander, and George Arthur Wallace. Principles and Practice of Electrical Engineering. 6th ed., 2nd imp. New York ; London: McGraw-Hill, 1947.

MLA (8th ed.) Citation

Gray, Alexander, and George Arthur Wallace. Principles and Practice of Electrical Engineering. 6th ed., 2nd imp. McGraw-Hill, 1947.