It is recommended that before you produce any adventures for us that you become familiar with the Pathfinder Compatibility License. Although you are not required to sign and agree to these term, all 3PP are and thus are legally bound to uphold the high standards set by Paizo Publishing for the Pathfinder Role-playing Game.
The entire agreement is available for you to read at the following hyperlink:
One of the most important items to note on the agreement is to which books reference is allowed. I am pasting this information here so should you need it you may quickly find it in the future. I have many times caught myself wondering if I could reference a particular section or feat listed within one of many Pathfinder tomes.
Here they are!
Exhibit B: List of Products which May Be Referenced
Last updated March 1, 2013
Pathfinder® Roleplaying Game Core Rulebook™ (PZO1110)