McGraw-Hill's guide to UK wiring standards for earthing & bonding per Stockin, David

Available for University of the Philippines Diliman via McGraw-Hill Access Engineering. Click here to access
Also available remotely for University of the Philippines Diliman via McGraw-Hill Access Engineering. Click here to access thru EZproxy

Mcgraw-Hill's National Electrical Code 2014 grounding and earthing handbook per Stockin, David R.

Available for University of the Philippines Diliman via McGraw-Hill Access Engineering. Click here to access
Also available remotely for University of the Philippines Diliman via McGraw-Hill Access Engineering. Click here to access thru EZproxy