R. Cacayorin, . L. Almodiel, . R. L. Angara, J. K. Bulosan, M. E. Pajarillo, and R. D. . Mosqueda, Ph.D. CRIM, “The Effectiveness of Checkpoint Conducted by the Philippine National Police at Batasan Hills During Campaign Period”, AASgBCPJMRA, vol. 1, no. 1, Apr. 2019.