格雷 & 张蕙仪. (2012). 孩子来自天堂: Children are from heaven. 中信出版社.
Chicago Style (17th ed.) Citation格雷 and 张蕙仪. 孩子来自天堂: Children Are from Heaven. 中信出版社, 2012.
MLA (8th ed.) Citation格雷 and 张蕙仪. 孩子来自天堂: Children Are from Heaven. 中信出版社, 2012.
Warning: These citations may not always be 100% accurate.