Dr. Franklyn M. Branley. (1998). Floating in Space (Let's-Read-and-Find-Out Science 2). HarperCollins.
Lua i Stíl Chicago (17ú heag.)Dr. Franklyn M. Branley. Floating in Space (Let's-Read-and-Find-Out Science 2). HarperCollins, 1998.
Lua MLA (9ú heag.)Dr. Franklyn M. Branley. Floating in Space (Let's-Read-and-Find-Out Science 2). HarperCollins, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.