El Messiri، A. A. M. (1991). The boundless canopy and the ruthless power: A study in Wordsworth's series of sonnets on the river Duddon and its dual conclusion. مجلة جامعة الملك سعود - الآداب، مج3, ع1 ، 3 - 14. مسترجع من http://search.mandumah.com/Record/660860
El Messiri، Abd Alwahab M. "The Boundless Canopy and the Ruthless Power: A Study in Wordsworth's Series of Sonnets On the River Duddon and Its Dual Conclusion." مجلة جامعة الملك سعود - الآداب مج3, ع1 (1991): 3 - 14. مسترجع من http://search.mandumah.com/Record/660860