[Samba] how to add Samba 3 to apt-get install

[Wayne Dozier(Samba)]

I have just installed a new serve running the lateststable 
vesion of Debian.  I am wanting to install Samba3 using 
apt-get install.  I know ihave to add it to the sources 
list somehow, but I am new to Debian.

Can someone help me out with this.  Am I correct in 
thinking I have to add it to the sources list.  Any hep 
would be greatly appreciated.

Oh, the reason i want toinstall with the apt-get command, 
is I want it to also be recognized and updated when 
running the apt-get update command.

Wayne