APA (7th ed.) Citation

Summers, W. I., & Watt, J. H. (1975). NFPA handbook of the national electrical code. McGraw-Hill Book.

Chicago Style (17th ed.) Citation

Summers, Wilford I., and John H. Watt. NFPA Handbook of the National Electrical Code. New York: McGraw-Hill Book, 1975.

MLA (9th ed.) Citation

Summers, Wilford I., and John H. Watt. NFPA Handbook of the National Electrical Code. McGraw-Hill Book, 1975.