(2006). Guidebook for safe closure of disposal sites. NSWMC, Office of the Secretariat.
Dyfyniad Arddull ChicagoGuidebook for Safe Closure of Disposal Sites. Quezon City: NSWMC, Office of the Secretariat, 2006.
Dyfyniad MLAGuidebook for Safe Closure of Disposal Sites. NSWMC, Office of the Secretariat, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.