COULIN, C. (1966). Step-by-step Perspective Drawing. Van Nostrand Reinhold Company.
Lua i Stíl Chicago (17ú heag.)COULIN, Claudius. Step-by-step Perspective Drawing. Van Nostrand Reinhold Company, 1966.
Lua MLA (8ú heag.)COULIN, Claudius. Step-by-step Perspective Drawing. Van Nostrand Reinhold Company, 1966.
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