Spencer, Kirsten, Stuart A. McErlain-Naylor, Natasha Paget, and Andrew Kilding. “Activity Profiles of Elite Netball Umpires: A Review”. Journal of Human Sport and Exercise 15, no. 4 (December 1, 2020): 816–825. Accessed March 28, 2024. https://www.jhse.ua.es/article/view/2020-v15-n4-activity-profiles-elite-netball-umpires-review.