凯雷特 & 楼武挺. (2020). 突然，响起一阵敲门声: Suddenly, a knock on the door. 湖南文艺出版社.
Dyfyniad Arddull Chicago凯雷特 and 楼武挺. 突然，响起一阵敲门声: Suddenly, a Knock on the Door. 湖南文艺出版社, 2020.
Dyfyniad MLA凯雷特 and 楼武挺. 突然，响起一阵敲门声: Suddenly, a Knock on the Door. 湖南文艺出版社, 2020.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.