Yonghua Yang (Yang, Yonghua)

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  Ke Ming Gen Ju Di Fa Zhi Shi
  by Yonghua Yang, Xipo Zhang, Yanlong Han
  Hardcover, Fa lu chu ban she, ISBN 7503614676 (7-5036-1467-6)
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  Zhongguo Gong Chan Dang Lian Zheng Fa Zhi Shi Yan Jiu
  by Yonghua Yang
  Hardcover, Ren min chu ban she, ISBN 7010052239 (7-01-005223-9)