Bool, F. H. 1., Ernst, B. 1., Kist, J. R., Locher, J. L. 1., Wierda, F. 1., Escher, M. C. 1., . . . Peters, P. (1992). Escher: The complete graphic work. London: Thames and Hudson.

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Bool, Flip H. 1947-, et al. Escher: The Complete Graphic Work. London: Thames and Hudson, 1992.