Não informado. (1972). Optical Engineering. Society of Photo-Optical Instrumentation Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. Optical Engineering. Redondo Beach, Calif: Society of Photo-Optical Instrumentation Engineers, 1972.
Lua MLA (8ú heag.)Não informado. Optical Engineering. Society of Photo-Optical Instrumentation Engineers, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.