damayanti, enarnimas (2025) “The Correlation Between Competitive State Anxiety and The Frequency of Unforced Errors in The Serving Technique of Badminton Athletes”, Journal of Racket Sports Performance & Science (JRSPS), 1(1), pp. 36–41. Available at: https://journal.unesa.ac.id/index.php/jrsps/article/view/47236 (Accessed: 5 December 2025).