库珀 & 郭峰. (2010). 不要开口就错: Just ask the right questions to get what you want. 东方出版社.
Lua i Stíl Chicago (17ú heag.)库珀 agus 郭峰. 不要开口就错: Just Ask the Right Questions to Get What You Want. 东方出版社, 2010.
Lua MLA (8ú heag.)库珀 agus 郭峰. 不要开口就错: Just Ask the Right Questions to Get What You Want. 东方出版社, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.