In fact, the first book where these rules were described was Disney Animation; the Illusion Of Life by Frank Thomas and Ollie Johnston, two of Disney`s legendary nine old men. The book was considered to be the bible of animation, and it mainly deals with how to bring life to your animation rather than just empty movement. John Lasseter, who received a formal 2D animation training at the Disney studios in the late seventies, was the first to apply these twelve principles to 3D-animation, and changed the industry forever. Because the book by Thomas and Johnston mostly deals with acting and drama in animation, I think it is quite valid for 3D as well; the acting in all of the Pixar films still seems to be very much inspired on the methods described in this book. You can probably still order it from Amazon.