Yuji MASUDA. A Brief Study of the Essential of Economics. Modern Perspectives in Economics, Business and Management Vol. 6, [S. l.], p. 171–174, 2021. DOI: 10.9734/bpi/mpebm/v6/3418F. Disponível em: https://stm.bookpi.org/MPEBM-V6/article/view/3414. Acesso em: 4 jun. 2026.