Candidates can identify reliable sources for their UPSC study materials by considering several factors. Official publications, such as the UPSC syllabus and previous exam papers, should serve as primary guidelines. Reputable authors and well-reviewed books are integral for foundational subjects. Referring to current affairs from esteemed newspapers and journals, alongside standard recommended websites, enhances comprehension of contemporary issues. Discussions with successful candidates and mentors can also provide insight into valuable resources. Last, consistent evaluation of the credibility of sources ensures that aspirants focus on high-quality materials that prepare them effectively.