APA (7 वां संस्करण) प्रशस्ति पत्र
Everyday English For Technical Students (Mechanical engineering, metallurgy and transport department).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEveryday English For Technical Students (Mechanical Engineering, Metallurgy and Transport Department).
एमएलए (8वां संस्करण) प्रशस्ति पत्रEveryday English For Technical Students (Mechanical Engineering, Metallurgy and Transport Department).
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