Clark, P. International Optical Design Conference 2021. SPIE Digital Library.
Čikaški stil citiranja (17. izdanje)Clark, Peter. International Optical Design Conference 2021. SPIE Digital Library.
MLA način citiranja (9. izdanje)Clark, Peter. International Optical Design Conference 2021. SPIE Digital Library.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.