There are many tools and style guides for citing works in papers and manuscripts. The following are options for creating bibliographies from citation and reprint management software. You may also be interested in Organizing an Article Reprint File.
EndNote Basic is a free cloud based resource for reference management. Sign up for an account via Web of Science, then add references to your EndNote library from Web of Science, Google Scholar, or PubMed. EndNote Basic now includes 2GB of storage to upload the pdfs of articles and associate them with references.
Please view a video tutorial if you'd like to learn how to register for an account, load references into EndNote Web, and output the references in a reference list in a particular style and use "Cite While You Write" in MS Word.
CiteULikeStores references and pdf reprints of articles. However, it doesn't have any output feature, so it won't translate a reference into a formatted citation for a bibliography. However, CiteULike does export references for uploading into EndNote, which can be used at Library computers with MS Word to format a paper/bibliography. View a short tutorial on CiteULike.
Citing medicine: the NLM style guide for authors, editors, and publishers. 2nd ed. 2007.NLM style is used in all NIH grant and review publications, and is the format used in PubMed summary citations. Citing Medicine provides assistance to authors in compiling lists of references for their publications, to editors in revising such lists, to publishers in setting reference standards for their authors and editors, and to librarians and others in formatting bibliographic citations.