Engel, P. (2009). 10-fold origami: Fabulous paperfolds you can make in just 10 steps! Tuttle.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEngel, Peter. 10-fold Origami: Fabulous Paperfolds You Can Make in Just 10 Steps! Toyko ; Rutland, Vt.: Tuttle, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEngel, Peter. 10-fold Origami: Fabulous Paperfolds You Can Make in Just 10 Steps! Tuttle, 2009.
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