Sites to help abbreviate journal titles

http://www.rci.rutgers.edu/~longhu/ChemJournalAbbreviation_Hu.htm

http://oliver.ross.p.luminy.univ-amu.fr/journal_abbrevs/abbrevc.htm

http://jabref.sourceforge.net/journals/journal_abbreviations_ieee.txt

http://www.efm.leeds.ac.uk/~mark/ISIabbr/C_abrvjt.html

Search for the title using keyworks like 'journal' and 'abbreviation'

Read articles from the journal that you are trying to publish in and see how their reference list looks