Peter, t. V., Martin, J., & Constable, G. (1974). Selected letters. Published for the Centre for Medieval Studies by the Pontifical Institute of Mediaeval Studies.
Chicago-стиль цитированияPeter, the Venerable, Janet Martin, and Giles Constable. Selected Letters. Toronto: Published for the Centre for Medieval Studies by the Pontifical Institute of Mediaeval Studies, 1974.
MLA-цитированиеPeter, the Venerable, et al. Selected Letters. Published for the Centre for Medieval Studies by the Pontifical Institute of Mediaeval Studies, 1974.
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