historical marker for the burial site of the seventeen martyrs of koronadal in Koronadal Central 1 Elementary School
City Government of Cotabato
2013
City Government of Cotabato Facebook page, <a rel="nofollow" class="external free" href="https://web.facebook.com/pg/CityofKoronadal/photos/?tab=album&amp;album_id=10151245132603576">https://web.facebook.com/pg/CityofKoronadal/photos/?tab=album&amp;album_id=10151245132603576</a>