@book{3430,
	author = {World Health Organization},
	title = {Symptom relief in terminal illness},
	publisher = {WHO,},
	year = {1998.},
	address = {Geneva :},
	url = {https://apps.who.int/iris/bitstream/handle/10665/42121/9241545070_eng.pdf?sequence=1&isAllowed=y}
}