Robert David Harper is buried at West Laurel Hill Cemetery, Bala Cynwyd, Pennsylvania.
The Importance of Personal Piety in the Christian Ministry (1852)
The Church Memorial: Containing Important Historical Facts and Reminiscences Connected with the Associate and Associate Reformed Church Previous to Their Union as the United Presbyterian Church of North America (1858)
Robert D. Harper, D.D. (1884)
The Unsolved Problem: What Shall Be Done With the Liquor Traffic? (1889)