M.C. Escher's letters to Canada, 1958-1972
MLA
Campbell, Cyndie, et al. M.c. Escher's Letters to Canada, 1958-1972. Library and Archives, Occasional Paper. Ottawa: National Gallery of Canada, 2013
APA, 7th edition
Campbell, C., Escher, M. C, Smith, F., & Escher, G. (2013). M.C. Escher's letters to Canada, 1958-1972. Library and Archives, occasional paper. Ottawa: National Gallery of Canada
Chicago, 17th edition
Campbell, Cyndie, M. C Escher, Frances Smith, and George Escher. M.C. Escher's letters to Canada, 1958-1972. Library and Archives, occasional paper. Ottawa: National Gallery of Canada, 2013