The effect of style (Self efficiency) on improving national spirit. Twejer Journal, Soran, Kurdistan regional Government,Iraq, v. 3, n. 1, p. 747–784, 2020. DOI: 10.31918/. Disponível em: https://journals.soran.edu.iq/index.php/Twejer/article/view/153.. Acesso em: 26 jan. 2025.