Read more than one source and notice the similarities and differences. Show this in your writing. Show connections or contrasts between authors / groups, then use this to support a point you are making. Here is what you can do:
For example:
Also compare these:
Smith and Jones both think the main issue is X in contrast to Brown and Black who emphasise Y. [Shows that there are two different groups of authors who disagree about an issue]
Smith thinks X. Brown thinks Y. [Not very good. Just reports two authors' views without synthesis]
Our results contradict the findings of Brown (1999) and Smith (2005). However ... [Shows synthesis]
How does this help you to show critical thinking?
It gives you an opportunity to show that you have actively processed, understood, and engaged with what you have read (rather than just repeating it). It also indicates that you have read widely, giving readers a positive feeling about your engagement.
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