Bottrill, G. et al(2005).Practical Electrical Equipment and Installations in Hazardous Areas (Cet. 1).Oxford:Penerbit Newnes An imprint of Elsevier.
Gaya MLA
Bottrill, Geoffrey. et al."Practical Electrical Equipment and Installations in Hazardous Areas".Cet. 1Oxford:Penerbit Newnes An imprint of Elsevier,2005.Text.