ebrary, Inc, & Classen, A. (2007). Old age in the Middle Ages and the Renaissance: Interdisciplinary approaches to a neglected topic. Walter de Gruyter.
芝加哥风格引文ebrary, Inc, 与 Albrecht Classen. Old Age in the Middle Ages and the Renaissance: Interdisciplinary Approaches to a Neglected Topic. Berlin ; New York: Walter de Gruyter, 2007.
MLA引文ebrary, Inc, 与 Albrecht Classen. Old Age in the Middle Ages and the Renaissance: Interdisciplinary Approaches to a Neglected Topic. Walter de Gruyter, 2007.
警告：这些引文格式不一定是100％准确.