APA-ийн эшлэл(7 дахь хэвлэлт)

ebrary, Inc, & Classen, A. (2007). Old age in the Middle Ages and the Renaissance: Interdisciplinary approaches to a neglected topic. Walter de Gruyter.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

ebrary, Inc, ба 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 -ийн эшлэл (9 дэх хэвлэлт)

ebrary, Inc, ба Albrecht Classen. Old Age in the Middle Ages and the Renaissance: Interdisciplinary Approaches to a Neglected Topic. Walter de Gruyter, 2007.