damayanti enarnimas, Hazar F, Khanina N, Ashari S. The Correlation Between Competitive State Anxiety and The Frequency of Unforced Errors in The Serving Technique of Badminton Athletes. JRSPS [Internet]. 2025 Nov. 27 [cited 2025 Dec. 5];1(1):36-41. Available from: https://journal.unesa.ac.id/index.php/jrsps/article/view/47236