Escher, M. C., & Sachs, M. S. (1991). The pop-up book of M. C. Escher. Pomegranate Artbooks.
Cita Chicago Style (17a ed.)Escher, M. C., e Michael Solomon Sachs. The Pop-up Book of M. C. Escher. Petaluma: Pomegranate Artbooks, 1991.
Cita MLA (8a ed.)Escher, M. C., e Michael Solomon Sachs. The Pop-up Book of M. C. Escher. Pomegranate Artbooks, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.