Salud, J. P. (2014). Ecoshield's engineered sanitary landfill: Technology whose time has come. Philippine Graphic.
Dyfyniad Arddull ChicagoSalud, Joel Pablo. "Ecoshield's Engineered Sanitary Landfill: Technology Whose Time Has Come." Philippine Graphic 2014.
Dyfyniad MLASalud, Joel Pablo. "Ecoshield's Engineered Sanitary Landfill: Technology Whose Time Has Come." Philippine Graphic, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.