Não informado. (2018). The Penrose Annual: Review of the graphic arts. Lund Humphries.
Chicago-referens (17:e uppl.)Não informado. The Penrose Annual: Review of the Graphic Arts. London: Lund Humphries, 2018.
MLA-referens (8:e uppl.)Não informado. The Penrose Annual: Review of the Graphic Arts. Lund Humphries, 2018.
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