Dr. Franklyn M. Branley. (1998). Floating in Space (Let's-Read-and-Find-Out Science 2). HarperCollins.
Cita Chicago (17th ed.)Dr. Franklyn M. Branley. Floating in Space (Let's-Read-and-Find-Out Science 2). HarperCollins, 1998.
Cita MLA (9th ed.)Dr. Franklyn M. Branley. Floating in Space (Let's-Read-and-Find-Out Science 2). HarperCollins, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.