WILLIAM LANGLAND. (1999). Piers Plowman with sir Gawain and the Green Knight, Pearl and Sir Orfeo (anon). London: Everyman's library.
シカゴスタイル引用形WILLIAM LANGLAND. Piers Plowman With Sir Gawain and the Green Knight, Pearl and Sir Orfeo (anon). London: Everyman's library, 1999.
MLA引用形式WILLIAM LANGLAND. Piers Plowman With Sir Gawain and the Green Knight, Pearl and Sir Orfeo (anon). London: Everyman's library, 1999.
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