TRUST ME. If you take your rear wheel off, and then remove the disc retaining bolt, you will see shoes with a cable, spring, and bolt that clamps them to the drum portion of the disc. Unles your car didn't come with an e-brake at all, you have them.
look at this: TMS
Notice how it dosn't look like a flat frisbee? The e-brake is in that cylender that extends from the center of the rotor and clamps down on the inside of it.
edit: You sillyhead!