Müller, Anetta, Éva Bácsné Bába, Christa Sára Pfau, Éva Judit Bartha, Anikó Molnár, and Károly Pető. 2020. “MARKETING ACTIVITIES OF FITNESS SERVICE PROVIDERS IN THE NORTHERN GREAT PLAIN REGION”. Acta Carolus Robertus 10 (2): 117-36. https://doi.org/10.33032/acr.2481.