1. I want to add access date ahead of the url. How to modify the bibtex file?

  2. Could you tell me how to add [Online] as well?

Hawking, S. 2000. Professor Stephen Hawking's website. [Online]. [Accessed 25 August 2017]. Available from: http://www.hawking.org.uk/

The full .bst is available here which is made by makebst.

A MWE is

 author = {Hawking, S.},
 year = {2000},
 title = {{Professor Stephen Hawking's website}},
 urldate = {2017-08-25},
 url = {http://www.hawking.org.uk/}


As argued by \cite{hawking2000}, \dots


The function of url format is

FUNCTION {format.url}
  duplicate$ empty$
    { pop$ "" }
       "\urlprefix\url{" swap$ * "}"  *  }
  • That bit of the .bst file only prints the URL. I guess it would be easier to help if we could see the entire .bst file and a short example document with an example citation that we can use to test our modifications (tex.meta.stackexchange.com/q/228/35864 and tex.meta.stackexchange.com/q/4407/35864). If the .bst file is on CTAN or can be downloaded elsewhere, a link is enough, but if it is already a custom style it would probably be best if you could upload it to a text-sharing website (please avoid file-sharing websites where one has to download .zips or the like).
    – moewe
    Jan 20, 2019 at 13:57
  • @moewe Thanks a lot for the advice. The question is modified as required.
    – WZhao
    Jan 20, 2019 at 14:41

1 Answer 1


Add the following function solve the issue for me.

FUNCTION {format.urldate}
{ urldate duplicate$ empty$
    { pop$ "" }
    { "~[Accessed: " swap$ * "]" * "[Online]" add.period$ swap$ * }

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