Slack, K. M. (1967). Constancy and change in the Society of Friends. Swarthmore Lecture.
Citazione stile Chigago Style (17a edizione)Slack, Kathleen M. "Constancy and Change in the Society of Friends." Swarthmore Lecture 1967.
Citatione MLA (9a ed.)Slack, Kathleen M. "Constancy and Change in the Society of Friends." Swarthmore Lecture, 1967.
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