1. ^{{cite book |last1= Sipe |first1= Chester Hale |authorlink1= |title= Fort Ligonier and its times: a history of the first English fort west of the Allegheny Mountains... |url= http://www.libraries.psu.edu/do/digitalbookshelf/27995198/27995198_part_14.pdf|format= |year= 1932|publisher=The Telegraph Press |location= |language= |isbn= |oclc= |doi= |id= |page= 300 |quote= |ref= |bibcode= }}
2. ^{{cite book |last1= Van Voorhis|first1= John Stogdell |authorlink1= |last2= |first2= |editor1-first= |editor1-last= |editor1-link= |others= |title= The Old and New Monongahela |url= https://books.google.com/books?id=bZl4AAAAMAAJ&pg=PA299&lpg=PA299&dq=%22Spark's+Fort%22&source=bl&ots=TD2CMKp3q3&sig=gHP-c3GQPCZA2Vq-9_AFv9e4MgM&hl=en&ei=YOQBSpzAE43CMbGgxdcH&sa=X&oi=book_result&ct=result&resnum=7|format= |year= 1893|origyear= |publisher= |location= |language= |isbn= |oclc= |doi= |id= |page= 299 |quote= |ref= |bibcode= }}