Wright, W. D. (1958). The measurement of colour (Segunda edición.). Hilger and Watts.
Tohutoru Kātū Chicago (17th ed.)Wright, W. D. The Measurement of Colour. Segunda edición. London, England, United Kingdom: Hilger and Watts, 1958.
Tohutoro MLA (9th ed.)Wright, W. D. The Measurement of Colour. Segunda edición. Hilger and Watts, 1958.
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