Indian standardds institution. (1985). Code of practice for installation of septic tanks (1.). Indian Standards Institution.
Dyfyniad Arddull ChicagoIndian standardds institution. Code of Practice for Installation of Septic Tanks. 1. New Delhi: Indian Standards Institution, 1985.
Dyfyniad MLAIndian standardds institution. Code of Practice for Installation of Septic Tanks. 1. Indian Standards Institution, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.