APA (7th ed.) Citation

Harman & Allen. (1993). Guide to the national electrical code 1993 edition. PTR Prentice Hall.

Chicago Style (17th ed.) Citation

Harman and Allen. Guide to the National Electrical Code 1993 Edition. New Jersey: PTR Prentice Hall, 1993.

MLA (8th ed.) Citation

Harman and Allen. Guide to the National Electrical Code 1993 Edition. PTR Prentice Hall, 1993.

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