There isn't a single formula for writing a good acknowledgement, but there are some key elements that should be included. First, you should express your gratitude to anyone who helped you with your research, whether they provided financial support, technical assistance, or simply moral encouragement. Second, you should make sure to mention anyone who contributed directly to your research, including your supervisor, co-researchers, and participants. Third, you should brief mention any other sources of support, such as funding bodies and academic institutions. Finally, you should try to keep your acknowledgement concise and to the point.
Here are some examples of acknowledgements from published research articles:
"The authors would like to thank X for their help with the data collection and Y for their help with the literature review. The authors would also like to thank the participants for their time and cooperation. This research was supported by a grant from the XYZ Foundation."
"The authors would like to thank the XYZ Foundation for their financial support and the ABC Institute for providing access to the research facilities. The authors would also like to thank the participants for their time and cooperation."
"The authors are grateful to X, Y, and Z for their helpful comments on an earlier version of this article. They would also like to thank the participants for their time and cooperation. This research was supported in part by a grant from the XYZ Foundation."