Rujukan Perentasan_masa

  1. Hawking, Stephen (27 April 2010). "STEPHEN HAWKING: How to build a time machine". Daily Mail. Dicapai 7 Ogos 2015. 

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Rujukan

WikiPedia: Perentasan_masa http://www.asimovs.com/_issue_0407/onthenet2.shtml http://science.howstuffworks.com/time-travel.htm http://www.springerlink.com/app/home/contribution.... http://timetravelportal.com/viewtopic.php?t=293 http://timetravelportal.com/viewtopic.php?t=300 http://www.theory.caltech.edu/people/patricia/lcto... http://web.mit.edu/adorai/timetraveler http://plato.stanford.edu/entries/time-machine/ http://plato.stanford.edu/entries/time-travel-phys http://plato.stanford.edu/entries/time-travel-phys...