It is very important that you record accurately and consistently details of any material that you consult. This allows anyone reading your work to see:
When writting for publication many journals will have their own referencing and editiorial standards. Always check the advice for authors information section of journal/publishers websites.
Here are some useful links for support with copyright issues.
RefWorks is a web-based service that allows users to store and manage their references and to produce bibliographies in a range of citation formats for assignments and publication.