Penrose graphic arts international annual (the); 1975 volume 68

MLA

Smith, B.H. Penrose Graphic Arts International Annual (the); 1975 Volume 68. London: Northwood publications, 1975.

APA

Smith, B. (1975). Penrose graphic arts international annual (the); 1975 volume 68. London: Northwood publications.

Chicago

Smith, B.H. Penrose Graphic Arts International Annual (the); 1975 Volume 68. London: Northwood publications, 1975.