Actually the target card from the book will work just fine, but you need to fill the frame with the target. Then you'll see three spikes in the histogram (one on the left, one in the middle and one of the right) assuming that the exposure is proper. If you only see two, or the third one is clipped, then you adjust your exposure till you have three good spikes that are fully visible. I use the fold up (like a reflector) unit that is mentioned by one of the other posters but I also use the one from the book. It works like a charm.
When used as illustrated in your photo, you can make great use of Photoshop Curves and the three eyedroppers for exact color balance.
Here is another target for exposure use:
Cheers,
rfs