APA (7th ed.) Zitazioa

Lettington, A. Optical Systems for Space and Defence. SPIE Digital Library.

Chicago Style (17th ed.) Zitazioa

Lettington, Alan. Optical Systems for Space and Defence. SPIE Digital Library.

MLA (9th ed.) Zitazioa

Lettington, Alan. Optical Systems for Space and Defence. SPIE Digital Library.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.