Combine Multiple Rows To Single Column

With the below query iam able to retrieve all the tables invloved in a stored proc. But, what I want to display the table names as comma separated list for each table.

;WITH stored_procedures AS (
SELECT o.id,
o.name AS proc_name, oo.name AS table_name,
ROW_NUMBER() OVER(partition by o.name,oo.name ORDER BY o.name,oo.name) AS row
FROM sysdepends d
INNER JOIN sysobjects o ON o.id=d.id
INNER JOIN sysobjects oo ON oo.id=d.depid
WHERE o.xtype = 'P')
SELECT id,proc_name, table_name FROM stored_procedures
WHERE row = 1
ORDER BY proc_name,table_name