O'Brien, D. J. (1982). American Catholic Social Ethics: Twentieth Century Approaches. Five Perspectives - V. Horizons, 9(2), 337-340. doi:10.1017/S0360966900022702
Citazione stile Chigago Style (17a edizione)O'Brien, David J. "American Catholic Social Ethics: Twentieth Century Approaches. Five Perspectives - V." Horizons 9, no. 2 (1982): 337-340, https://doi.org/10.1017/S0360966900022702.
Citatione MLA (9a ed.)O'Brien, David J. "American Catholic Social Ethics: Twentieth Century Approaches. Five Perspectives - V." Horizons, vol. 9, no. 2, 1982, pp. 337-340, https://doi.org/10.1017/S0360966900022702.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.