Before you prepare the "References" section of your paper, make a list of sources used in the paper (i.e., journal articles, books, proceedings, electronic resources, etc.). Choose a format among C-S , C-N and N-Y systems to cite the works used in your paper. Decide:
a) how you use the authors’ names, (e.g., Author's last name followed by first and middle initials or first initial only);
b) Journals (abbreviated titles or full titles).
When you cite the journal titles in abbreviated forms in the "References", use a standard form of abbreviation of journal titles found in print publications, such as BIOSIS Serial Sources, INSPEC LIST of Journals. Journal abbreviations can also be found in databases like, PubMed and PubMed Central. Also, a number of authoritative websites provide standard form of journal abbreviations as listed in the sidebar 'Journal Title Abbreviations' in this guide. Regardless of the system you choose (N-Y or C-S or C-N), be consistent with the style and the format of citations in running text and the references.