Entertainment, Inc.) . http://www.rottentomatoes.com/m/marley_and_me/news/1788464/box_office_guru_wrapup_marley_takes_1_the_spirit_tanks . Retrieved December 29, 2008 .   ^ McClintock, Pamela (December 28, 2008). " 'Marley' leads holiday box office pack ". Variety . http://www.variety.com/article/VR1117997766.html?categoryId=13&cs=1 . Retrieved December 28, 2008 .   ^ Coyle, Jake (December 29, 2008). " 'Valkyrie' non-flop augurs well for Cruise, UA ". Yahoo!