杜会琴. (2011). 20几岁懂了就不晚: You are not too late to know this. 龙门书局.
Chicago Style (17. basım) Atıf杜会琴. 20几岁懂了就不晚: You Are Not Too Late to Know This. 龙门书局, 2011.
MLA (8th ed.) Atıf杜会琴. 20几岁懂了就不晚: You Are Not Too Late to Know This. 龙门书局, 2011.
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