The official book of parliamentary procedure is: Choose matching definition Koch's Postulates Pasteur's Principles Robert's Rules of Order The Pledge of Allegiance

## Step 1<br />The question is asking for the official book of parliamentary procedure. This is a book that provides the rules and guidelines for conducting meetings and making decisions in a formal setting.<br />## Step 2<br />The options provided are Koch's Postulates, Pasteur's Principles, Robert's Rules of Order, and The Pledge of Allegiance. <br />## Step 3<br />Koch's Postulates and Pasteur's Principles are related to microbiology, procedure. The Pledge of Allegiance is a patriotic oath in the United States, not a book of parliamentary procedure.<br />## Step 4<br />Robert's Rules of Order is a book that provides the rules and guidelines for conducting meetings and making decisions in a formal setting. It is widely used in many organizations and is considered the official book of parliamentary procedure.