@book{57638,
	author = {American Petroleum Institute, API},
	title = {Recommended practice for design and installation, and maintenance of electrical systems for fixed and floating offshore petroleum facilities for unclassified and class I, zone 0, zone 1 and zone 2 locations :},
	publisher = {American Petroleum Institute, API,},
	year = {2013.},
	address = {Washington :},
	edition = {2da. ed.}
}