APA Цитирование

Engzell, P., Frey, A., & Verhagen, M. D. (2021). Learning loss due to school closures during the COVID-19 pandemic. Proc Natl Acad Sci U S A.

Chicago-стиль цитирования

Engzell, Per, Arun Frey, and Mark D. Verhagen. "Learning Loss Due to School Closures During the COVID-19 Pandemic." Proc Natl Acad Sci U S A 2021.

MLA-цитирование

Engzell, Per, Arun Frey, and Mark D. Verhagen. "Learning Loss Due to School Closures During the COVID-19 Pandemic." Proc Natl Acad Sci U S A 2021.

Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.