Find digital copies of the National Basketball Association's official basketball rule book online through NBA.com, NBAHoopsOnline.com and SportsKnowHow.com. A PDF version of the rules for the Woman's National Basketball Association is found on WNBA.com. Amazon.com also sells physical copies of official basketball rulebooks.
Each year the National Basketball Association and the Woman's National Basketball Association publish updated rules and guidelines for the current sport season and make these rules available online so that fans and players are able to use them. Listings for physical rule books on Amazon.com are typically created by third-party publishers compiling these rules rather than the official organizations themselves.