APA-referens (7:e uppl.)
ebrary, Inc, Classen, A., & Sandidge, M. (2010). Friendship in the Middle Ages and early modern age: Explorations of a fundamental ethical discourse. Walter de Gruyter.
Chicago-referens (17:e uppl.)
ebrary, Inc, Albrecht Classen, och Marilyn Sandidge. Friendship in the Middle Ages and Early Modern Age: Explorations of a Fundamental Ethical Discourse. Berlin ; New York: Walter de Gruyter, 2010.
MLA-referens (9:e uppl.)
ebrary, Inc, et al. Friendship in the Middle Ages and Early Modern Age: Explorations of a Fundamental Ethical Discourse. Walter de Gruyter, 2010.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.