The publisher may have author guidelines on how to cite data. Also, look for examples from previously published papers.
The repository or source of the dataset may have suggested citations.
If there are no recommended data citation models, try using DataCite recommendations for the minimum format for citing data:
Creator- Creator or author of the data set
Title- Title of the dataset
Identifier- a unique identifier of the dataset, such as a DOI or a link to the dataset.
Optional elements (as appropriate)
Recommended forms of a data citation are:
Creator (Publication Year): Title. Publisher. Identifier
Creator (Publication Year): Title. Version. Publisher. Resource Type. Identifier