Biography (Wikipedia)
Biography (Rutgers University)
Biography (McClintock and Strong Cyclopedia)
Historical marker for Frelinghuysen Hall at Rutgers University, New Brunswick, New Jersey.
A centopah at t Elm Ridge Cemetery, North Brunswick, New Jersey memorializes where Theodorus Jacobus Frelinghuysen is buried.
Letter dated April 22, 1725 (1725, 1902)
A Clear Demonstration of a Righteous and Ungodly Man, in Their Frame, Way and End. Containing Five Excellent Sermons, Preached in the Dutch Tongue (1731)
Sermons of Theodorus Jacobus Frelinghuysen (1856)
Theodorus Jacobus Frelinghuysen (1869)
Theodorus Jacobus Frelinghuysen: The Father of American Pietism (1945)