The New King James Version, NKJV, published by Thomas Nelson, has had a triquetra printed on its cover since its inception. Riplinger examines the history and current usage of this symbol and proves it to be a pagan symbol.
(One of Riplinger's degrees is a Master of Fine Arts in which research was done in the origin and migration of symbols. This was followed by an invitation to teach a college course on the History of Symbols for a large state university.)
You will get a college level analysis of the history and usage of the NKJV's triquetra. When you have viewed this presentation, with many, many visuals, you will be convinced that this symbol does not belong on a Bible. The symbol, perhaps, is a warning that the contents of the NKJV are pagan, as well.