How to enter daterange into a raw?

Hi,

I have installed PostgreSQL 9.2 on my desktop machine, and
pgAdmin III version: 1.16.1.

I'm being creating a new database with daterange type.

When I'm trying to enter in the 'Edit Data - PostgreSQL' window in the
first raw a range of data:

'2013-09-01, 2013-11-01' without quotes, I get error message:
ERROR:  array value must start with "{" or dimension information
LINE 1: INSERT INTO public.negyedev(ettol_eddig) VALUES ('2013-09-01...
      ^
 
I want inclusive start and end bounds.

Well, I dont know how to enter the start data and the end data of the
range in pgAdmin III?

-- 
Regards from Pal