Zotero.

EndNote could be another good option. However, Mendeley is by far much better.

For citation management, online citation managers are an easy way to keep track of all of the references. you can use following software.

1. Mendeley

2. EndNote

3. Zotero

Most of these are used 'Mendeley' as reference managers. Endnote can also be used if you do not use Mandeley.

Try Endnote9, its a very powerful tool, i hope it helps.

Charles Addey thank you so much for sharing this with me. Much appreciated.