ALLEN, R. (1971). Colour chemistry. Nelson.
Cita Chicago (17th ed.)ALLEN, R.L.M. Colour Chemistry. London: Nelson, 1971.
Cita MLA (9th ed.)ALLEN, R.L.M. Colour Chemistry. Nelson, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)