United States Soccer Federation. The official rules of soccer. Triumph Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States Soccer Federation. The Official Rules of Soccer. Chicago, Ill.: Triumph Books.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnited States Soccer Federation. The Official Rules of Soccer. Triumph Books.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.