To embed this query inline into a wiki page use the code below.

{{#ask: [[Category:Reference Materials]]
 |?Author name
 |?Source name
 |?Year
 |?Keyword
 |format=table
 |limit=250
 |offset=500
 |sort=Citation count
 |order=desc
 |mainlabel=
}}

Query log

{
    "query_string": "[[Category:Reference Materials]]",
    "query_source": "SMWSQLStore",
    "query_time": "0.3930",
    "from_cache": false
}