Παραπομπή σε μορφή APA (7η εκδ.)

Sorrell, P. (1979). Studies in the treatment of theme and its sources in some Old English narrative poems. University of Cambridge.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Sorrell, Paul. Studies in the Treatment of Theme and Its Sources in Some Old English Narrative Poems. University of Cambridge, 1979.

Παραπομπή σε μορφή MLA (8th εκδ.)

Sorrell, Paul. Studies in the Treatment of Theme and Its Sources in Some Old English Narrative Poems. University of Cambridge, 1979.