Hill, D. A. (2013). Life: Pre-Intermediate. Teacher's Book . B1 (Vietnam edtion.). Singapore: National Geographic Learning; Cengage Learning.
শিকাগো স্টাইলে সাইটেশনHill, David A. Life: Pre-Intermediate. Teacher's Book . B1. Vietnam edtion. Singapore: National Geographic Learning; Cengage Learning, 2013.
এমএলএ সাইটেশনHill, David A. Life: Pre-Intermediate. Teacher's Book . B1. Vietnam edtion. Singapore: National Geographic Learning; Cengage Learning, 2013.
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