There are 14 plays attributed to Wang and only three are extant. His The Story of the Western Wing (Xi Xiang Ji) is one of the most famous Chinese plays and is still popular today. It is an amplified zaju (杂剧), a then popular theatrical form. 
Wang, Shifu, Edited and Translated with an Introduction by Stephen H. West and Wilt L. Idema; with a Study of Its Woodblock Illustrations by Yao Dajuin. The Moon and the Zither: The Story of the Western Wing. Berkeley: University of California Press, 1991. ISBN 0520068076.