Ritchie, S. (2011). Look at that building: A first book of structures. Kids Can Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRitchie, Scot. Look at That Building: A First Book of Structures. Toronto: Kids Can Press, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRitchie, Scot. Look at That Building: A First Book of Structures. Kids Can Press, 2011.
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