Graaf, C. v. d. (1945). The Dirae: With translation, commentary and an investigation of its authorship. E.J. Brill.
Lua i Stíl Chicago (17ú heag.)Graaf, Cornelis van der. The Dirae: With Translation, Commentary and an Investigation of Its Authorship. Leiden: E.J. Brill, 1945.
Lua MLA (8ú heag.)Graaf, Cornelis van der. The Dirae: With Translation, Commentary and an Investigation of Its Authorship. E.J. Brill, 1945.
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