Bulloch, I. (1992). Patterns: Help your child have fun with maths. Two-Can.
Lua i Stíl Chicago (17ú heag.)Bulloch, Ivan. Patterns: Help Your Child Have Fun with Maths. London: Two-Can, 1992.
Lua MLA (9ú heag.)Bulloch, Ivan. Patterns: Help Your Child Have Fun with Maths. Two-Can, 1992.
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