| 其他書名 | Text Eight of LaSalle's Basic Texts on the Principles of Sound Selling - Compiled from the Experience of Thousands of Successful Salesmen |
| 出版 | La Salle Extension University, 1922 |
| URL | http://books.google.com.hk/books?id=AO1DAQAAMAAJ&hl=&source=gbs_api |