Know-How Exchange : Copywriting

Here's what I did: Provide a hyperlink the first time, noting in the copy that this is an important resource for the material being discussed. Then in future sections include a phrase like, "Einstein further notes ..." or "Again according to Einstein ..." but without the hyperlink.

I'm not sure there is a "correct" way. What you want to do is make sure you disclose what/who your source is without interrupting the flow of your material with [repeated] hyperlinks.

I've done this a number of times, including online seminars and whitepapers for major clients (Fortune Top 100) whose lawyers seemed to think it was OK.

Hope this helps.

Is there anchor text in the original article that you could specifically link to?
If this is for a scholarly website, consider using Ibid and using footnotes.

Here's something that may help: https://ia.juniata.edu/citation/mla/mla00.htm
It basically agrees with Michael's approach.

The correct terms to use in an article where a citation is used once, and then referred to multiple times in the remaining text are:

Ibid. [note the period], with this text set in Italics, OR op. cit. [again, set in Italics, and again, note the use of periods].

The differences for these terms are explained here: >>https://design.caltech.edu/erik/Misc/Ibid_and_Op_Cit.html

Ibid. is Latin, short for ibidem, meaning "in the same place".

Op. cit. is also Latin, and it's short for opus citatum, meaning "the work cited".

In another, non-marketing life I spent in excess of 20 years working in museums as a designer and some-time editor. Curators and academics use these terms in scholarly works.

Repeating what everyone else said - provide link at first citation, along with name and/or author. At later times, refer to the article by name or author only (no link).