Não informado. Perceptual Cognitive Development. Galton Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Perceptual Cognitive Development. Los Angeles, Calif: Galton Institute.
Lua MLA (8ú heag.)Não informado. Perceptual Cognitive Development. Galton Institute.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.