APA (7th ed.) Citation

Heywood, C., Cowey, A., & Newcombe, F. (1991). Chromatic Discrimination in a Cortically Colour Blind Observer.

Chicago Style (17th ed.) Citation

Heywood, C., A. Cowey, and F. Newcombe. Chromatic Discrimination in a Cortically Colour Blind Observer. 1991.

MLA (9th ed.) Citation

Heywood, C., et al. Chromatic Discrimination in a Cortically Colour Blind Observer. 1991.