Mueller, R. R. (1977). Festival and fiction in Heinrich Wittenwiler's Ring: A study of the narrative in its relation to the traditional topoi of marriage, folly, and play. J. Benjamins.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Mueller, Rolf R. Festival and Fiction in Heinrich Wittenwiler's Ring: A Study of the Narrative in Its Relation to the Traditional Topoi of Marriage, Folly, and Play. Amsterdam: J. Benjamins, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Mueller, Rolf R. Festival and Fiction in Heinrich Wittenwiler's Ring: A Study of the Narrative in Its Relation to the Traditional Topoi of Marriage, Folly, and Play. J. Benjamins, 1977.
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