Lewis, H. (1925). The principles of perspective explained and applied in a series of graduated exercises (13th ed.). G. Rowney.
Citace podle Chicago (17th ed.)Lewis, Henry. The Principles of Perspective Explained and Applied in a Series of Graduated Exercises. 13th ed. London: G. Rowney, 1925.
Citace podle MLA (8th ed.)Lewis, Henry. The Principles of Perspective Explained and Applied in a Series of Graduated Exercises. 13th ed. G. Rowney, 1925.
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