Dyfyniad APA

Indian Standards Institution. (1979). Indian Standard: Specification for High Density Polyethylene Pipes for Water Supplies, Sewage and Industrial Effluents. Indian Standards Institution.

Dyfyniad Arddull Chicago

Indian Standards Institution. Indian Standard: Specification for High Density Polyethylene Pipes for Water Supplies, Sewage and Industrial Effluents. N.Delhi: Indian Standards Institution, 1979.

Dyfyniad MLA

Indian Standards Institution. Indian Standard: Specification for High Density Polyethylene Pipes for Water Supplies, Sewage and Industrial Effluents. Indian Standards Institution, 1979.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.