Gaya APA

Stauffer, H, B. (2011). Ugly`s electrical safety and NFPA 70 E : for systems rafed at 600 volts and below . Massachusetts: Jones and Bartlett Publisher.

Gaya MLA

Stauffer, H., Brooke. "Ugly`s electrical safety and NFPA 70 E : for systems rafed at 600 volts and below". Massachusetts: Jones and Bartlett Publisher, 2011. Text.