What might be confusing is that in two of the technique books on latin and two on the standard style, their are differences. We can add to that the original ISTD book in which there are differences to the now current book. To sum it up In the original book Alex Moore wrote . I quote. It is to be also hoped that no student will be foolish enough to be gulled into the belief that a parrot's knowlege of its contents will satify an astute examiner. My self I would go with the ISTD for Standard and Walter Laird IDTA for Latin.