1. ^{{cite book|url=https://books.google.com/books?id=Rwv8CgAAQBAJ&pg=PA11&dq=William+E.+Robertson+baseball&hl=en&sa=X&ved=0ahUKEwj758zt-pXOAhUGHR4KHQFOAxQQ6AEIPzAH#v=onepage&q=William%20E.%20Robertson%20baseball&f=false |title=Were They Truly Champions? |author=Terrence Grant |page=11 |website=Books.google.com |date=2015-10-19 |accessdate=2016-11-24}}
2. ^{{cite book|url=https://books.google.com/books?id=fqcfBgAAQBAJ&pg=PA188&dq=William++Robertson+baseball&hl=en&sa=X&ved=0ahUKEwja86WI-5XOAhXEax4KHVnVBGgQ6AEIHDAA#v=onepage&q=William%20%20Robertson%20baseball&f=false |title=Baseball's Pivotal Era, 1945-1951 |author=William Marshall |page=288 |website=Books.google.com |date=2015-01-13 |accessdate=2016-11-24}}