The functions which are part of OpenGL 3.3 are listed in its man pages. If the function talked about in the book is not listed in this, then that function would be part of OpenGL 4 or above. The man pages strictly have only what is absoluted mandated for that particular version of OpenGL. OpenGL 4 man pages are also there to verify against.
Another resource is OpenGL 3.2 reference card which lists them neatly. You can compare it with the 4.3 reference card to know the difference.
Above all OpenGL is an open specification, so you are free to look up the OpenGL 3.3 specification to confirm some assumption if you want to be just sure.