@book{2122,
	author = {World Health Organization},
	title = {WHO guidelines for assessing quality of herbal medicines with reference to contaminants and residues},
	publisher = {WHO,},
	year = {2007.},
	address = {Geneva :},
	url = {https://apps.who.int/iris/bitstream/handle/10665/43510/9789241594448_eng.pdf?sequence=1&isAllowed=y}
}