于文博 & 冯兵强. (2008). 每天进步1%: Make progress by one percent each day. 知识出版社.
Chicago (17e ed.) Bronvermelding于文博 en 冯兵强. 每天进步1%: Make Progress by One Percent Each Day. 知识出版社, 2008.
MLA (8e ed.) Bronvermelding于文博 en 冯兵强. 每天进步1%: Make Progress by One Percent Each Day. 知识出版社, 2008.
Let op: Deze citaties zijn niet altijd 100% accuraat.