@book{172147,
	author = {Association of Official Analytical Chemists and Cunniff, Patricia, ed. and Association of Official Analytical Chemists},
	title = {Official methods of analysis of AOAC international  /},
	publisher = { AOAC International,},
	year = {1998},
	address = {Estados Unidos de América  :},
	edition = {16a ed. rev.}
}