Lang, R. J. (2011). Origami design secrets: Mathematical methods for an ancient art (2nd.). CRC Press.
Chicago-viite (17. p.)Lang, Robert J. Origami Design Secrets: Mathematical Methods for an Ancient Art. 2nd. Boca Raton: CRC Press, 2011.
MLA-viite (9. p.)Lang, Robert J. Origami Design Secrets: Mathematical Methods for an Ancient Art. 2nd. CRC Press, 2011.
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