Karamousalidis Γεώργιος, Laparidis Κωνσταντίνος, Galazoulas Χρήστος, and Bebetsos Ευάγγελος. 2009. “Validity and Reliability of the Questionnaire of Role Ambiguity in Greek Team Sports”. Inquiries in Physical Education and Sport 7 (1):72-80. https://doi.org/10.26253/heal.uth.ojs.ispe.2009.1306.