Hi! When writing sources in an essay, always follow a consistent citation style like APA, MLA, or Chicago. Include author names, publication year, title, and source details. For online sources, add the URL and access date. Using tools like citation generators can simplify this process. Also, practicing essay writing under exam conditions, such as with a mock test PTE, helps you get comfortable citing sources quickly and accurately, ensuring your work is both credible and well-structured. Consistent practice makes it much easier over time!