姚延波. (2008). 旅行社经营与管理: Operation and management of travel servie. 首都经济贸易大学出版社.
Lua i Stíl Chicago (17ú heag.)姚延波. 旅行社经营与管理: Operation and Management of Travel Servie. 首都经济贸易大学出版社, 2008.
Lua MLA (8ú heag.)姚延波. 旅行社经营与管理: Operation and Management of Travel Servie. 首都经济贸易大学出版社, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.