(德)大卫·萨菲尔(David Safier)著. (2018). 寻找丢失的钥匙. 译林出版社.
Lua i Stíl Chicago (17ú heag.)(德)大卫·萨菲尔(David Safier)著. 寻找丢失的钥匙. 译林出版社, 2018.
Lua MLA (8ú heag.)(德)大卫·萨菲尔(David Safier)著. 寻找丢失的钥匙. 译林出版社, 2018.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.