Não informado. (1969). Celestial Mechanics: An international journal of space dynamics. Reidel Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Celestial Mechanics: An International Journal of Space Dynamics. Dordrecht, Holanda: Reidel Publishing, 1969.
Lua MLA (8ú heag.)Não informado. Celestial Mechanics: An International Journal of Space Dynamics. Reidel Publishing, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.