杜会琴. (2011). 20几岁懂了就不晚: You are not too late to know this. 龙门书局.
Citación estilo Chicago杜会琴. 20几岁懂了就不晚: You Are Not Too Late to Know This. 龙门书局, 2011.
Cita MLA杜会琴. 20几岁懂了就不晚: You Are Not Too Late to Know This. 龙门书局, 2011.
警告：这些引文格式不一定是100％准确.
Cita APA