WILLIAM LANGLAND. (1999). Piers Plowman with sir Gawain and the Green Knight, Pearl and Sir Orfeo (anon). London: Everyman's library.
استشهاد بنمط شيكاغوWILLIAM LANGLAND. Piers Plowman With Sir Gawain and the Green Knight, Pearl and Sir Orfeo (anon). London: Everyman's library, 1999.
MLA استشهادWILLIAM LANGLAND. Piers Plowman With Sir Gawain and the Green Knight, Pearl and Sir Orfeo (anon). London: Everyman's library, 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.