老面. (2009). 一杯咖啡的时光: What's in a cup of coffee. 山西经济出版社.
Chicago (17e ed.) Bronvermelding老面. 一杯咖啡的时光: What's in a Cup of Coffee. 山西经济出版社, 2009.
MLA (8e ed.) Bronvermelding老面. 一杯咖啡的时光: What's in a Cup of Coffee. 山西经济出版社, 2009.
Let op: Deze citaties zijn niet altijd 100% accuraat.