Indian Standards Institution. (1970). Indian Standard: Specification for Rubber Sealing Rings for Gas Mains, Water Mains and Sewers. Indian Standards Institution.
Chicago Stili AlıntıIndian Standards Institution. Indian Standard: Specification for Rubber Sealing Rings for Gas Mains, Water Mains and Sewers. N.Delhi: Indian Standards Institution, 1970.
MLA AlıntıIndian Standards Institution. Indian Standard: Specification for Rubber Sealing Rings for Gas Mains, Water Mains and Sewers. Indian Standards Institution, 1970.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..