Hopper, R. (2004). Advanced throwing on the potter's wheel: Extended and altered forms. PotteryVideos.com.
Chicago-viite (17. p.)Hopper, Robin. Advanced Throwing on the Potter's Wheel: Extended and Altered Forms. [Gabriola, B.C.?]: PotteryVideos.com, 2004.
MLA-viite (9. p.)Hopper, Robin. Advanced Throwing on the Potter's Wheel: Extended and Altered Forms. PotteryVideos.com, 2004.
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