Dani Chandra Yudho Pranoto, Rufi’i, Sabariah, Bandono, A. and Susanto, F. 2026. Challenging Tasks, Motivated Cadets: Structural Validation of Task Challenge in ESP Reading for Aviation. Langit Biru: Jurnal Ilmiah Aviasi. 19, 1 (Feb. 2026), 41 - 53. DOI:https://doi.org/10.54147/langitbiru.v19i1.1575.