Langan John. (2008). English Skills with Readings (Tái bản lần thứ 7.). American: Mc Graw-Hill.
শিকাগো স্টাইলে সাইটেশনLangan John. English Skills With Readings. Tái bản lần thứ 7. American: Mc Graw-Hill, 2008.
এমএলএ সাইটেশনLangan John. English Skills With Readings. Tái bản lần thứ 7. American: Mc Graw-Hill, 2008.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.