Sources

1. Journal

1.1. Journal of English for Academic Purposes 100(23),47-58,2016

1.1.1. Cumming,Lai and Cho(2016)con firm that instructions can help students improve their use of sources in writing.

2. Hardcopy

2.1. An Introduction to Scholarship

2.1.1. According to Siewierski (2015:8 8) We should use reading skills to filter and evaluate the credibility of returned results.

3. Online website

3.1. The University of Adelaide

3.1.1. Learning Guide:Source Credibili ty(The University of Adelaide,20 10)