Eva, Nur, Qurrotul Aini Fitria Sari, Ravitawati Dwi Andini, and alsabila Zara Mahasin. 2021. “The Role of Optimism in Responding to Covid-19”. KnE Social Sciences 4 (15), 365–369. https://doi.org/10.18502/kss.v4i15.8224.