Hemme Tambunan, E., and R. Renolita Sinaga. “Stress Levels and Coping Strategy of Nursing Students in Online Learning During COVID-19 Pandemic. A Mixed- Methods Study”. Investigación Y Educación En Enfermería, vol. 41, no. 2, June 2023, doi:10.17533/udea.iee.v41n2e09.