Rozdział: Form of social capital and a willingness to perform charitable activities : a comparative analysis based on the example of Polish and Spanish students / Rafał Nagaj. - // W: Contemporary socio-economic issues and problems : management - processes / editors Aneta Sokół, Irena Figurska, Karolina Drela. - Brarislava : Kartprint, 2016 (WorkId 5533)