Gardner, I. In for a Penny: Money Boxes related games and school items from the Museum of Childhood collection. Museum of Childhood.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGardner, Ian. In for a Penny: Money Boxes Related Games and School Items from the Museum of Childhood Collection. Edinburgh: Museum of Childhood.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGardner, Ian. In for a Penny: Money Boxes Related Games and School Items from the Museum of Childhood Collection. Museum of Childhood.
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