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Thompson, Jonathan M. (ed.) Prime Directive PD20. Star Fleet Universe. Additional material by Stephen V. Cole, Gary Plana, Matthew Francois, Loren Knight, and Alex Chobot. Edited by Steven P. Petrick, Ken Burnside, and Leanna M. Cole. Cover by Eric Lofgren. Illustrations by Alvin Belflower amd Dale McKee. Computer Graphics by Ted Geibel, Ken Burnside, and Stephen V. Cole. Deck Plans by Nick Blank. Some background elements were originally created for the first edition of Prime Directive by Timothy D. Olsen and Mark Costello. Developed by Ken Burnside, Andrew Palmer, John Hall, and Doug E, Lampert. Playtested by Adam R. Thompson, Wanda Thompson, B.L. Sisemore, Edward McBrayer, Christopher Helton, Mark Vorwerk, Richard A. Spake, Dave Walters, Michael Scott, Dale Davis, and Chad Calkins. Amarillo Design Bureau, Inc., 2 November 2005.