Saputra, I. H., E. R. Rustiana, and R. Rumini. “Performance Analysis of Physical Education Teachers Related to the Certification and Supervision Program in Tenggarong Seberang District”. Journal of Physical Education and Sports, Vol. 8, no. 2, Mar. 2019, pp. 176-81, https://journal.unnes.ac.id/sju/jpes/article/view/29587.