APA Citation

(1989). Contact lenses: Part 1. Specification for rigid contact lenses. London: BSI.

Chicago Style Citation

Contact Lenses: Part 1. Specification for Rigid Contact Lenses. London: BSI, 1989.

MLA Citation

Contact Lenses: Part 1. Specification for Rigid Contact Lenses. London: BSI, 1989.

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