Indian Standards Institution. (1970). Indian Standard: Specification for Rubber Sealing Rings for Gas Mains, Water Mains and Sewers. Indian Standards Institution.
শিকাগো স্টাইলে সাইটেশনIndian Standards Institution. Indian Standard: Specification for Rubber Sealing Rings for Gas Mains, Water Mains and Sewers. N.Delhi: Indian Standards Institution, 1970.
এমএলএ সাইটেশনIndian Standards Institution. Indian Standard: Specification for Rubber Sealing Rings for Gas Mains, Water Mains and Sewers. Indian Standards Institution, 1970.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.