^Cox, Harold (2004).
"Senate Members 'B'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 16, 2020.
^
abCox, Harold (2004).
"Senate Members 'A'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 16, 2020.
^
abcdCox, Harold (2004).
"Senate Members 'C'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 16, 2020.
^Cox, Harold (2004).
"Senate Members 'B'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 16, 2020.
^
abCox, Harold (2004).
"Senate Members 'A'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 16, 2020.
^
abcdCox, Harold (2004).
"Senate Members 'C'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 16, 2020.