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판 6개, 최신 판부터
Prometheus Books, 2000, ISBN 9781573928458
Lawbook Exchange, 1999, ISBN 9781584770237
Dartmouth Pub., 1998, ISBN 9781855216495
Hackett Pub., 1998, ISBN 9780872204331
Cambridge University Press, 1995, ISBN 9780521442442
B. Franklin, 1970, ISBN 9780833701299