Lectura, L., & Talisayon, S. (2015). Designing, Testing and implementing a Technology-based and improved leave administration system at the UP Human resource Development Office. University of the Philippines Diliman.

Lectura, Leizel, and Serafin Talisayon. Designing, Testing and Implementing a Technology-based and Improved Leave Administration System at the UP Human Resource Development Office. Quezon City: University of the Philippines Diliman, 2015.

Lectura, Leizel, and Serafin Talisayon. Designing, Testing and Implementing a Technology-based and Improved Leave Administration System at the UP Human Resource Development Office. University of the Philippines Diliman, 2015.