执云 & 高芬. (2009). 鼓励是珍贵的礼物: Encouragement - a precious gift. 光明日报出版社.
Chicago Style (17th ed.) Citation执云 and 高芬. 鼓励是珍贵的礼物: Encouragement - a Precious Gift. 光明日报出版社, 2009.
MLA (8th ed.) Citation执云 and 高芬. 鼓励是珍贵的礼物: Encouragement - a Precious Gift. 光明日报出版社, 2009.
Warning: These citations may not always be 100% accurate.