Kraus, F. (1890). Utrum Sophoclis an Euripidis Electra aetate prior sit quaeritur. Typis Expressit.
Lua i Stíl Chicago (17ú heag.)Kraus, Friedrich. Utrum Sophoclis an Euripidis Electra Aetate Prior Sit Quaeritur. Passaviae: Typis Expressit, 1890.
Lua MLA (8ú heag.)Kraus, Friedrich. Utrum Sophoclis an Euripidis Electra Aetate Prior Sit Quaeritur. Typis Expressit, 1890.
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