Peter Drucker and Time Sheets

In a recent debate with a VeraSage naysayer, Peter Drucker was invoked as saying, "If you can't measure it, you can't manage it."

First, let me say that I cannot find this as a direct quote of Drucker's other than continuous and unsubstantiated citations in many articles, blog posts, and PowerPoint presentations all over the Internet. If anyone has the direct knowledge of the book or published article wherein Drucker says these exact words, please let me know. Until such time, please do not attribute this quote to Drucker.

Second, in my research looking for this quote, I found the following:

Reports and procedures should be the tool of the man who fills them out. They must never themselves become the measure of his performance. A man must never be judged by the quality of the production forms he fills out - unless he be the clerk in change of these forms. He must always be judged by his production performance. And the only way to make sure of this it by have him fill out no forms, make no reports, expect those he need himself to achieve performance. - Peter Ferdinand Drucker, The Practice of Management, 1954, page 135.

All emphasis mine.

Does anyone now want to say that Peter Drucker would be in favor of submitted time sheets to measure productivity? I rest my case.