Because there's some variation depending on the exact configuration of the engine, the best approach is to:
1. Consult your owner's manual: This is the most reliable source.
2. Look closely at the valve cover: The PCV valve is relatively easy to spot once you know what to look for. It's often near the rear of the valve cover.
3. Look for a hose coming from the valve cover: Trace the hose; it will lead you to the PCV valve.
If you still can't find it, a picture of your engine bay (focusing on the valve cover area) would help.