APA (7th ed.) Citation

Saifuddin, S., Amir, N., & Sumaryanto, S. Development of the referee anxiety scale in officiating football matches. Universitas Negeri Yogyakarta.

Chicago Style (17th ed.) Citation

Saifuddin, Saifuddin, Nyak Amir, and Sumaryanto Sumaryanto. Development of the Referee Anxiety Scale in Officiating Football Matches. Universitas Negeri Yogyakarta.

MLA (9th ed.) Citation

Saifuddin, Saifuddin, et al. Development of the Referee Anxiety Scale in Officiating Football Matches. Universitas Negeri Yogyakarta.

Warning: These citations may not always be 100% accurate.