Citation managers (also called reference managers or bibliographic management software) offer a way to save, organize and manage references. Many work with word processing software to format in-text citations and bibliographies for papers and theses, allow you to share references, and enable you to attach or link PDFs to a citation record.
Citation managers supported by the UC Berkeley Library:
For additional options: Wikipedia comparison of reference management software
There are hundreds of different citation styles. Here is the same citation formatted in five different scientific citation styles. Note the differences in the order, format and punctuation of the elements of the citation; also note that styles vary in whether they include the issue number or the DOI, and whether or not they abbreviate the journal name:
The journal Nature:
Brar, G. A. & Weissman, J. S. Ribosome profiling reveals the what, when, where and how of protein synthesis. Nat. Rev. Mol. Cell Biol. 16, 651-664 (2015).
Guide to Nature citation style: https://www.nature.com/nature/for-authors/formatting-guide
The journal Science:
G. A. Brar, J. S. Weissman, Ribosome profiling reveals the what, when, where and how of protein synthesis. Nat. Rev. Mol. Cell Biol. 16, 651-664 (2015).
Guide to Science citation style: https://www.sciencemag.org/authors/instructions-preparing-initial-manuscript
Council of Science Editors, 8th edition:
Brar GA, Weissman JS. 2015. Ribosome profiling reveals the what, when, where and how of protein synthesis. Nat Rev Mol Cell Biol. 16(11):651-64.
Guide to the Council of Science Editors citation style: https://www.scientificstyleandformat.org/Tools/SSF-Citation-Quick-Guide.html
The journal BioScience:
Brar GA, Weissman JS. 2015. Ribosome profiling reveals the what, when, where and how of protein synthesis. Nature Reviews. Molecular Cell Biology 16: 651-664.
Guide to BioScience citation style: https://static.primary.prod.gcms.the-infra.com/static/site/bioscience/document/2015-bioscience-style-guide.doc
The Journal of Cell Biology:
Brar, G.A., and J.S. Weissman. 2015. Ribosome profiling reveals the what, when, where and how of protein synthesis. Nat. Rev. Mol. Cell Biol. 16:651-664. doi: 10.1038/nrm4069.
Guide to Journal of Cell Biology citation style: https://rupress.org/jcb/pages/reference-guidelines
The journal Cell:
Brar, G.A., and Weissman, J.S. (2015). Ribosome profiling reveals the what, when, where and how of protein synthesis. Nat. Rev. Mol. Cell Biol. 16, 651–664.
Guide to Cell citation style: https://www.cell.com/cell/authors#format