Okuda, Michael and Okuda, Denise. The Star Trek Encyclopedia, 2nd ed. Illustrations by Doug Drexler. Photo Editing by Margaret Clark. Research Consulting by Robert H. Justman, Greg Jein, and Bjo Trimble. Additional Research by Curt Danhauser and S.J. Casey Bernay. First Edition with Debbie Mirek. Pocket Books, December 1997.