4. What citation style should I use?
In general, the citation must fulfill three requirements:
- it should be human-readable
- it should contain sufficient information for another person to identify and locate the source
- if applicable, it should include a URL to the source. The URL should ideally be a digital object identifier (DOI) link, of the form
https://doi.org/xx.xxxx/xxxxxxxxx
. This helps to prevent link rot, e.g. when publishers change the URL associated with content.
Any citation style that meets these requirements is acceptable. However, on Chemistry.SE, the use of the American Chemical Society (ACS) style is preferred. Therefore, editors are encouraged to improve references which are found to be incomplete or in a different style; once references are provided in the preferred ACS style, they should not be changed.
The ACS style is outlined in the ACS Style Guide and a summary of the key points may be found in Loong's answer here.
Some online encyclopedias are often updated with new content. Therefore, it may be useful to use a permanent link, which leads to the text as it was at the time. For example, Wikipedia allows one to link to a specific revision of each of its pages; this may be easily accessed using the "Cite this page" link in the Wikipedia sidebar.
For images found online, one should ideally provide the link to the image and also the author of the image / website name (if applicable).
To prevent link rot further, you can also check if the page is available on the Internet Archive and/or deposit it there for future reference. If you suspect that a webpage URL may not be permanent, please do consider saving that page on the Archive.
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