how to harvard refernce

The guide first covers general points of how and why you should reference.
The second section covers how to create the citations that go in the body of your work to show where all the information you use has come from.

Harvard Referencing Guide
Unlike many referencing styles, there is no source document for a Harvard Guide. This guide is based on Commonwealth of Australia 2002, Style Manual for authors, editors and printers , 6th edn , rev. by Snooks & Co, John Wiley & Sons, Australia, Milton; and a wide range of online Harvard Guides were also consulted.

A table of contents, which can be used as a quick guide on each page
examples of in-text citing for each source type
basic explanations of key terms and symbols used in referencing
more comprehensive coverage of source types
rules for page numbers at the top of each page
notes included with individual examples where relevant, highlighting details that may be overlooked
tips for figures, tables and musical notation at Appendix A
a quick guide for referencing articles at Appendix B
a quick guide to in-text referencing at Appendix C
a sample reference list at Appendix D

References:

http://guides.lib.monash.edu/citing-referencing/harvard
http://libguides.ioe.ac.uk/c.php?g=482485&p=3299750