Welford, W. T. (1989). Aberrations of optical systems. A. Hilger.
Lua i Stíl Chicago (17ú heag.)Welford, W. T. Aberrations of Optical Systems. Bristol ; Philadelphia: A. Hilger, 1989.
Lua MLA (9ú heag.)Welford, W. T. Aberrations of Optical Systems. A. Hilger, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
