"The primary source of this play, based on the ancient White Snake story, is a 1956 novel by Zhao Qingge called The Legend of the White Snake, translated by Paul White (New World Press Limited, 1998)"--title page verso.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The white snake : a play by Mary Zimmerman. ISBN 9780810129276. Published by Northwestern University Press in 2013. Publication and catalogue information, links to buy online and reader comments.
