Zipcodezoo site Enterobacteriales Archived 2014-04-27 at the Wayback Machine accessed 9 Mar 2013 NCBI Enterobacteriales accessed 9 Mar 2013 Taxonomicon Enterobacteriales accessed 9 Mar 2013
गामाप्रोटियोबैक्टीरिया प्रोटियोबैक्टीरिया ग्राम-ऋणात्मक बैक्टीरिया Zipcodezoo site Enterobacteriales, accessed 2014-04-27 NCBI Enterobacteriales accessed 9 Mar 2013 Taxonomicon Enterobacteriales accessed 9 Mar 2013