Basic Electronics. I. K. International Pvt Ltd. March 2011. pp. 184–. GGKEY:9NLKFQ9D0F2. Archived from the original on 2 May 2013. Retrieved 20 April 2011.
Basic Electronics. I. K. International Pvt Ltd. March 2011. pp. 184–. GGKEY:9NLKFQ9D0F2. Archived from the original on 2 May 2013. Retrieved 20 April 2011.