Syed Ambon, S.A.E. et al. 2017. Prestasi kecergasan daya tahan kardiovaskular pemain Ragbi Agong Cup’s Negeri Kedah Darul Aman berdasarkan ujian pacer 20-meter Multistage Shuttle Run: Cardiovascular endurancefitness performance among Kedah Rugby Agong Cup’s players based on 20-meter Multistage Shuttle Run pacer test. Jurnal Sains Sukan & Pendidikan Jasmani. 6, 2 (Nov. 2017), 55–64. DOI:https://doi.org/10.37134/jsspj.vol6.2.6.2017.