Dr. Franklyn M. Branley. (1998). Floating in Space (Let's-Read-and-Find-Out Science 2). HarperCollins.
Čikaški stil citiranja (17. izdanje)Dr. Franklyn M. Branley. Floating in Space (Let's-Read-and-Find-Out Science 2). HarperCollins, 1998.
MLA način citiranja (9. izdanje)Dr. Franklyn M. Branley. Floating in Space (Let's-Read-and-Find-Out Science 2). HarperCollins, 1998.
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