You need to include the following:
Author (surname followed by initials) Title of review. Year month day of review. In: Title of database [Internet]. Place of publication: publisher. year. Available from: URL or DOI. Record No.: CD...
You will usually find this information on the first page/screen of the systematic review.
Pasquali S, Hadjinicolaou AV, Sileni VC, Rossi CR, Mocellin S. Systemic treatments for metastatic cutaneous melanoma. 2018 Feb 6. In: The Cochrane Database of Systematic Reviews [Internet]. Hoboken (NJ): John Wiley & Sons, Ltd. 2018. Available from: https://doi.org/10.1002/14651858.CD011123.pub2. Record No.: CD011123.