Yes, other Christian writers and scholars are routinely quoted in many of the publications. Gleason Archer is a Christian Fundamentalist scholar who has been referred to and quoted quite often in the various publications. In the societie's quotes and references, Gleason Archer often sounds like a very intelligent scholar. But if you look into much of the other writings that he has done; you will see that Archer's views are often some what irrational and even down right silly.
One of you already made reference to what Raymond Franz said about the writing department using other Christian references. Franz also stated something that I found kind of humorous. According to Franz, Karl Klein was irritated by the writing department using references of other Christian scholars. According to Franz, Karl Klein routinely referred to it as "sucking on the tit of Babylon the Great".