Gaya APA
Langland, W. et al (1990).
Piers plowman with Sir Gawain and the Green Knight, Pearl and Sir Orfeo (anon) .
London:
Random House.
Gaya MLA
Langland, William. et al.
"Piers plowman with Sir Gawain and the Green Knight, Pearl and Sir Orfeo (anon)".
London:
Random House,
1990.
Text.