https://www.quora.com/On-Wikipedia-how-can-you-cite-the-same-source-more-than-once-without-them-becoming-separate-references

https://en.wikipedia.org/wiki/Help:Footnotes#Footnotes:_using_a_source_more_than_once gives the following method:

Definition, anywhere on article, likely ideally as the first usage:
``
<ref name="myname">{{cite web ...}}</ref>
``

And then you can use it later on as:
``
<ref name="myname" />
``
which automatically expands the exact same thing, or using the shortcut:
``
{{r|myname}}
``

To cite multiple pages of a book: https://en.wikipedia.org/wiki/Wikipedia:Citing_sources#Citing_multiple_pages_of_the_same_source[], the best method is to define and use the reference without adding the `p` or `location` in `cite` as:
``
<ref name="googleStory">{{cite book |title=The Google Story}}</ref>{{rp|p=123}}
``
Do not set the page in `cite`, otherwise it shows up on the references. Instead we use the https://en.wikipedia.org/wiki/Template:Rp[`{{rp}}` template]. And then use the reference with the https://en.wikipedia.org/wiki/Template:R[`{{r}}`] template as:
``
{{r|googleStory|p=456}}
``
or for multiple pages:
``
{{r|googleStory|pp=123, 156-158}}
``


Discussion on "How to use a single source multiple times in a Wikipedia article?" by Ciro Santilli (@cirosantilli, 34)