Indian Standards Institution. (1969). Indian Standard: Specification for Low Density Polyethylene Pipes for Potable water Supplies. Indian Standards Institution.
শিকাগো স্টাইলে সাইটেশনIndian Standards Institution. Indian Standard: Specification for Low Density Polyethylene Pipes for Potable Water Supplies. N.Delhi: Indian Standards Institution, 1969.
এমএলএ সাইটেশনIndian Standards Institution. Indian Standard: Specification for Low Density Polyethylene Pipes for Potable Water Supplies. Indian Standards Institution, 1969.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.