Riyadi, S., Permana, T. and Al Gifari, M. 2026. Development and Content Validation of a Psychomotor Assessment Instrument for Conventional Distributor-Type Diesel Fuel System Maintenance. AEEJ : Journal of Automotive Engineering and Vocational Education. 7, 1 (Jun. 2026), 1-16. DOI:https://doi.org/https://doi.org/10.24036/aeej.v7i1.315.