闫瑞娟. (2011). 每天一堂业绩课: Daily achievement class. 新世界出版社.
Lua i Stíl Chicago (17ú heag.)闫瑞娟. 每天一堂业绩课: Daily Achievement Class. 新世界出版社, 2011.
Lua MLA (8ú heag.)闫瑞娟. 每天一堂业绩课: Daily Achievement Class. 新世界出版社, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.