@book{WHO2020,
author = {WHO},
title= {International Guidelines for Certification and Classification (Coding) of COVID-19 as Cause of Death},
year = {2020},
URL = {https://www.who.int/publications/m/item/international-guidelines-for-certification-and-classification-(coding)-of-covid-19-as-cause-of-death},
address = {Geneva},
publisher = {WHO},
}