damayanti, enarnimas, Fatih Hazar, Naila Khanina, and Sani Ashari. 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):36-41. https://journal.unesa.ac.id/index.php/jrsps/article/view/47236.