Z Score Comparative Analysis of Tourism, Restaurant and Hotel Sub-Sector Companies Listed on The Indonesia Stock Exchange Before and After The Implementation of The Covid-19 Vaccine Policytittle . INVEST [Internet]. 8 aprilie 2023 [citat 30 iulie 2026];4(1):101-9. Disponibil la: https://journal.al-matani.com/index.php/invest/article/view/440