Kindly go through it:

http://www.rcsb.org/pdb/static.do?p=general_information/about_pdb/policies_references.html

thanks

http://www.dcc.ac.uk/resources/how-guides/cite-datasets#sec:requirements

check it as well

http://www.dcc.ac.uk/resources/how-guides/cite-datasets#sec:requirements

How to Cite Datasets and Link to Publications

http://www.dcc.ac.uk/resources/how-guides/cite-datasets#sec:requirements

thanks