@book{153528,
	author = {Wawryk, Alexandra S.},
	title = {International environmental standards in the oil industry},
	note = {Página visitada en enero de 2004 ; Navegadores de Internet ; Adobe Acrobat (PDF)},
	url = {http://www.dundee.ac.uk/cepmlp/journal/html/Vol13/article13-3.pdf}
}