L. Witek, K. Szalonka. GREEN AND HEALTHY CONSUMPTION IN POLAND: PROSUMPTION AND PURCHASE FROM A TRUSTED SOURCE AS AN ALTERNATIVE FOR CERTIFIED ORGANIC PRODUCTS. 4th International Multidisciplinary Scientific Conference on Social Sciences and Arts SGEM 2017, 2017, pp. 443-450. https://doi.org/10.5593/sgemsocial2017/15/S05.055