Gaya APA

Usman,{et.all}, A. et al (1987). Electrical wiring Commercial Based On the 1987 National Electrical Code (keenam). United States of America: Delmar Publ.Inc..

Gaya MLA

Usman,{et.all}, Ansor. et al. "Electrical wiring Commercial Based On the 1987 National Electrical Code". keenam United States of America: Delmar Publ.Inc., 1987. Text.