李秀琴 (1997年). “《姓氏·名字·稱謂》(中國歷史文化知識叢書)”. 大像出版社. ISBN7534720109. Kiểm tra giá trị ngày tháng trong: |date= (trợ giúp); |url= trống hay bị thiếu (trợ giúp)
Tianjun Liu, Xiao Mei Qiang (2013). “Chinese Medical Qigong”. tr. 590. ISBN1848190964. Mencius (371—289 BCE), born in Zou county (Shandong province), first name Ke, style name Zi Yu, was a famous philosopher, educator, politician, and expert on the Qigong life nurturing of Confucius in the Zhanguo Period. |url= trống hay bị thiếu (trợ giúp)
“Origins of Chinese Names”. 2007. tr. 142. ISBN9812294627. In ancient times, besides having a surname and a given name, one would have a courtesy name "Zì" as well. The courtesy name was the proper form of address for an adult. On reaching 20 years of age, young men would "put on the hat" as... |url= trống hay bị thiếu (trợ giúp)
