You can cite that transcription of the record. The usual approach here is to use the text that appears under "Citing this Record" on the FamilySearch page. The right-hand side of the FamilySearch includes the text "bk 4 pg 151", which suggests where the record can be found in the town records.
Ideally, we would also go back to the original record to verify the source. I believe that some films are available for online viewing at FamilySearch, but I can't see that in the catalog record for this one. (There are other WikiTreers who might be able to find it, if it's there.) For now, however, cite the FamilySearch record you found.