金 & 曹聪. (2016). 蜗牛和乌龟: Snail and turtle are friends. 河北少年儿童出版社.
Chicago (17e ed.) Bronvermelding金 en 曹聪. 蜗牛和乌龟: Snail and Turtle Are Friends. 河北少年儿童出版社, 2016.
MLA (8e ed.) Bronvermelding金 en 曹聪. 蜗牛和乌龟: Snail and Turtle Are Friends. 河北少年儿童出版社, 2016.
Let op: Deze citaties zijn niet altijd 100% accuraat.