Hànyǔ fāngyán gàiyào (An introduction to Chinese dialects). Beijing, China: Wénzì gǎigé chūbǎnshè. (袁家驊.
Hànyǔ fāngyán gàiyào (An introduction to Chinese dialects). Beijing, China: Wénzì gǎigé chūbǎnshè. (Yuán Jiachē).