APA (7th ed.) Citation

Douthwaite, W. A. (1987). Contact lens optics / W.A. Douthwaite. Butterworths.

Chicago Style (17th ed.) Citation

Douthwaite, W. A. Contact Lens Optics / W.A. Douthwaite. London: Butterworths, 1987.

MLA (9th ed.) Citation

Douthwaite, W. A. Contact Lens Optics / W.A. Douthwaite. Butterworths, 1987.

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