APA (7th ed.) Citation

Kok, J. H. (1991). New developments in the field of contact lenses.

Chicago Style (17th ed.) Citation

Kok, Jan H. New Developments in the Field of Contact Lenses. 1991.

MLA (9th ed.) Citation

Kok, Jan H. New Developments in the Field of Contact Lenses. 1991.

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