APA (7th ed.) Citation

Clerc, L. P. (1971). L.P. Clerc's photography : theory and practice 6: colour processes: Theory and practice 6: colour processes (4th edition.). Focal Press.

Chicago Style (17th ed.) Citation

Clerc, Louis Philippe. L.P. Clerc's Photography : Theory and Practice 6: Colour Processes: Theory and Practice 6: Colour Processes. 4th edition. London: Focal Press, 1971.

MLA (9th ed.) Citation

Clerc, Louis Philippe. L.P. Clerc's Photography : Theory and Practice 6: Colour Processes: Theory and Practice 6: Colour Processes. 4th edition. Focal Press, 1971.

Warning: These citations may not always be 100% accurate.