https://dataverse.org/best-practices/data-citation links to http://datascience.iq.harvard.edu but this website doesn't exist anymore.

In context:

For nearly 20 years, members of IQSS and its Data Science team, who work on the Dataverse Project, have played an active part in the the work to standardize data citation