Gaya APA

Mullin, R, C., Swanson, C, P. (1987). Electrical wiring residential based on the 1987 National Electrical ì Code . New York: New York: Delmar; 1987.

Gaya MLA

Mullin, Ray, C.., Swanson, Carl, P.. "Electrical wiring residential based on the 1987 National Electrical ì Code". New York: New York: Delmar; 1987, 1987. Text.