Add Citations markup?

Can you please let me know about the practical use case?

When writing an article, especially a technical/scientific/legal/medical one, but any article really, citations to the source are way to “hopefully” signal E-A-T for Google.

https://www.loudnoises.us/how-to-cite-sources-using-schema-org-in-json-ld/

I’m not an expert, but I have done it manually under the “article” type.

{
    "@context": "https://schema.org/",
    "@type": "Article",
    "headline": "Headline",
    "about": "About",
    "author": {
        "@type": "Person",
        "@id": "#ID",
        "name": "Name",
        "url":"URL"
    },
    "citation": [
        {
            "@type":"CreativeWork",
            "url":"URL",
            "name":"NAME",
            "description": "Describe",
            "text":"Text of Citation"
        },
        {
             "@type":"CreativeWork",
            "url":"URL",
            "name":"NAME",
            "description": "Describe",
            "text":"Text of Citation"
        },
         {
             "@type":"CreativeWork",
            "url":"URL",
            "name":"NAME",
            "description": "Describe",
            "text":"Text of Citation"
        }
    ],
    "copyrightHolder": {
        "@id":"URL#organization"
    },
    "copyrightYear": Year,
    "datePublished": "Date,
    "dateModified": "Date",
    "image": "URL",
    "inLanguage": "English",
    "keywords":[
            "Keyword1",
            "Keyword2",
            "Keyword3"
         ],
    "mainEntityOfPage":{
            "@id":"URL/#webpage"
         },
    "publisher": {
        "@id": "URL"
    },
    "sourceOrganization": {
        "@id": "URL/#organization"
    },
    "url": "URL"
      }
   ]
}