แหล่งที่มา WikiPedia: ร็อคกี้_2 http://www.allmovie.com/work/41859 http://www.boxofficemojo.com/movies/?id=rocky2.htm http://www.imdb.com/title/tt0079817/ http://www.rottentomatoes.com/m/rocky_ii/ http://www.tcm.com/tcmdb/title/20654/Rocky-II/ http://www.the-numbers.com/movies/1979/0RKY2.php
