OSTRYSZ, Elżbieta. The effectiveness of motivation methods. A case study of the Agricultural Social Insurance Fund branch office in Pleszew. Ubezpieczenia w Rolnictwie – Materiały i Studia, [S. l.], n. 2/80, p. 283–298, 2024. Disponível em: https://ojs.academicon.pl/ur/article/view/9983. Acesso em: 1 wrz. 2025.