Grillmeier, B. (2015). Outdoor play spaces for children. Images Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGrillmeier, Bruce. Outdoor Play Spaces for Children. Mulgrave, Victoria: Images Publishing, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGrillmeier, Bruce. Outdoor Play Spaces for Children. Images Publishing, 2015.
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