Sidek Mohd Noah & Jamaludin Ahmad (2005). Pembinaan Modul: Bagaimana Membina
Modul Latihan dan Modul Akademik. Serdang: Penerbit Universiti Putra Malaysia.
Latihan dan Modul Akademik. Serdang: Penerbit Universiti Putra MalaysiaYasin, M. A. S.
M., & Dzulkifli, M. A. (2011). Differences in depression, anxiety and stress between
low-and high-achieving students. Journal of Sustainability Science and Management, 6,
169–178.
Holt, J. (2015). Adolescents Stress and Its Effects on Their Academic Performance among
School Going Children. International Journal of Science and Research, 4(9).