Ball, N. (2019). Inspiring improv: Explore creative piecing with curves, strips, slabs and more (First edition.). Lucky Spool Media.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBall, Nicholas. Inspiring Improv: Explore Creative Piecing with Curves, Strips, Slabs and More. First edition. Pleasanton, CA: Lucky Spool Media, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBall, Nicholas. Inspiring Improv: Explore Creative Piecing with Curves, Strips, Slabs and More. First edition. Lucky Spool Media, 2019.
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