APA (7e ed.) Bronvermelding

Denny, R. (2001). Selling to win: Tested techniques for closing the sale (Rev. 2nd edition.). Kogan Page.

Chicago (17e ed.) Bronvermelding

Denny, Richard. Selling to Win: Tested Techniques for Closing the Sale. Rev. 2nd edition. London: Kogan Page, 2001.

MLA (8e ed.) Bronvermelding

Denny, Richard. Selling to Win: Tested Techniques for Closing the Sale. Rev. 2nd edition. Kogan Page, 2001.