Database Objects - Finding Dependencies

You come across tables in databases that are being populated by other pl/sql procs, triggers e.t.c what becomes difficult is to figure out which process is actually updating a table.

The following query will list objects that refer a table "TABLE_A" which belongs to a schema "SCHEMA_A"

select name,owner
from dba_dependencies
where referenced_name='TABLE_A' 
and referenced_owner='SCHEMA_A'