In Google Scholar, search for your topic. The results list will display with the most frequently cited results first:
Clicking on the Cited by link under a result will take you to the list of works that cited that particular source. You can use the Cited by feature to trace citations forward in time.
In Web of Science, search broadly for your topic. Then, click Times Cited to re-sort your results with the most frequently cited sources first.
Clicking the Times Cited link to the right of a result will pull up the list of sources that cited a particular work. You can use the Times Cited feature to trace citations forward in time.
In Google Scholar, enter the title of the work, inside quotation marks, into the search box. Under the search result, look for the Cited by link under the search result. This will show you how many times a particular source has been cited:
In Web of Science, select Cited Reference Search to see how many times a specific source has been cited:
Fill out the search fields with the author, publication date, cited title, and so on. You might see multiple results for a given work:
Select all that apply and click Finish Search. You'll then receive a list of all the documents that have cited a particular publication and can choose to Analyze the results or sort by Times Cited.