Gaya APA

Watt, J, H. (1972). NFPA handbook pof the national electrical code (Ed.3). New York: McGRAW-HILL BOOK COMPANY.

Gaya MLA

Watt, John, H.. "NFPA handbook pof the national electrical code". Ed.3 New York: McGRAW-HILL BOOK COMPANY, 1972. Text.