Bulloch, I. (1992). Patterns: Help your child have fun with maths. Two-Can.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBulloch, Ivan. Patterns: Help Your Child Have Fun with Maths. London: Two-Can, 1992.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBulloch, Ivan. Patterns: Help Your Child Have Fun with Maths. Two-Can, 1992.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.