Double Quote

Hi All,

Good Day, I'm newbie in unix, Seeking for your assistance on how to put a double quote on the records and create a name of field in the header

Ex:
From:
1243243,03/28/89,12,124

To:
Field1,Field2,Field3,Field4
"1243243","03/28/89","12","124"

Please advise,

Thanks