^
abCox, Harold (2004).
"Senate Members 'S'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
^
abcCox, Harold (2004).
"Senate Members 'H'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
^Cox, Harold (2004).
"Senate Members 'D'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
^Cox, Harold (2004).
"Senate Members 'L'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
^Cox, Harold (2004).
"Senate Members 'E'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
^
abCox, Harold (2004).
"Senate Members 'S'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
^
abcCox, Harold (2004).
"Senate Members 'H'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
^Cox, Harold (2004).
"Senate Members 'D'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
^Cox, Harold (2004).
"Senate Members 'L'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
^Cox, Harold (2004).
"Senate Members 'E'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.