Sweeney, A. (1985). Memorial Biography for Brother David Petry. https://oaks.kent.edu/node/3448
Sweeney, Archabbot. 1985. “Memorial Biography for Brother David Petry”. https://oaks.kent.edu/node/3448.
Sweeney, A. Memorial Biography for Brother David Petry. 14 Nov. 1985, https://oaks.kent.edu/node/3448.