Depending on the state, multiple copies of the DMV handbook or manual are produced.  For example, California produces one for Southern California and Northern California, as well as one for the AAA.

Our material is based on the latest, publicly available DMV handbooks made available by each state via their website and updated each year.  If you insist that you use a DMV handbook that matches our referenced numbers, the online version is the one to use.  It should be noted, however, that even if your page numbers do not match ours the material itself should still be correct.