Gaya APA

Mullin, R, C., Smith, R, L. (1987). Electrical wiring comercial: based on the 1987 national electrical code (6th ed). New York: Delmar Publishers Inc.

Gaya MLA

Mullin, Ray, C.., Smith, Robert, L.. "Electrical wiring comercial: based on the 1987 national electrical code". 6th ed New York: Delmar Publishers Inc, 1987. Printed Book.