@thesis{thesis,
		author={Purnamasari  Asri},
		title ={A set of analytical exposition text speaking materials using videos to develop students` critical thinking for 11th grader of language department of SMA Stella Duce 2 Yogyakarta},
		year={2011},
		url={http://repository.usd.ac.id/10069/},
		abstract={}
		}