Não informado. (2012). Photon International: The solar power magazine. Photon Europe GmbH.
Lua i Stíl Chicago (17ú heag.)Não informado. Photon International: The Solar Power Magazine. Aachen, Alemanha: Photon Europe GmbH, 2012.
Lua MLA (8ú heag.)Não informado. Photon International: The Solar Power Magazine. Photon Europe GmbH, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.