De la Cruz, Pacita T. (1984). "8419 Germantown Avenue". Adaptive re-use: An Early Twentieth Century Approach in Chestnut Hill, Philadelphia, by Dr. George Woodward, Developer, and Herman Louis Duhring, Jr., Architect (Master's thesis). Philadelphia, PA: University of Pennsylvania. p. 147 (pdf p.307). Archived from the original on 2018-12-25. Retrieved 2018-12-24.
De la Cruz, Pacita T. (1984). "8419 Germantown Avenue". Adaptive re-use: An Early Twentieth Century Approach in Chestnut Hill, Philadelphia, by Dr. George Woodward, Developer, and Herman Louis Duhring, Jr., Architect (Master's thesis). Philadelphia, PA: University of Pennsylvania. p. 147 (pdf p.307). Archived from the original on 2018-12-25. Retrieved 2018-12-24.