Hobbs, J. (2013). Sketch your world: Essential techniques for drawing on location. Page One.
Citace podle Chicago (17th ed.)Hobbs, James. Sketch Your World: Essential Techniques for Drawing on Location. Singapore: Page One, 2013.
Citace podle MLA (9th ed.)Hobbs, James. Sketch Your World: Essential Techniques for Drawing on Location. Page One, 2013.
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