Dio, R. V. ., S. M. G. . Apostol, and A. L. . Madrazo. “Drug Surrenderers and Crime Statistics During the Implementation of Project Double Barrel (PDB) in the Philippines”. International Journal of Social and Administrative Sciences, vol. 4, no. 1, Apr. 2019, pp. 31-43, doi:10.18488/journal.136.2019.41.31.43.