Παραπομπή APA

Denny Richard. (2003). Selling to win: Tested techniques for closing the sale (2.). Kogan Page.

Παραπομπή Chicago Style

Denny Richard. Selling to Win: Tested Techniques for Closing the Sale. 2. New Delhi: Kogan Page, 2003.

Παραπομπή MLA

Denny Richard. Selling to Win: Tested Techniques for Closing the Sale. 2. Kogan Page, 2003.