KĘDZIA, Piotr. Ethical aspects of the work of a personal trainer. In: KOWALSKA, Jolanta E.; KAŹMIERCZAK, Arkadiusz (eds.). Physical education, sport and olympism from a pedagogical perspective. Poland: Lodz University Press,2023. p. 221–229. DOI: 10.18778/331-324-5-14. Disponível em: https://www.press.uni.lodz.pl/index.php/wul/catalog/book/592/chapter/1589. Acesso em: 21 jan. 2026.