Cita APA (7a ed.)
Leinster, M. S.O.S. From Three Worlds. Ace Books.
Cita estilo Chicago (17a ed.)
Leinster, Murray. S.O.S. From Three Worlds. Nueva York, EUA: Ace Books.
Cita MLA (9a ed.)
Leinster, Murray. S.O.S. From Three Worlds. Ace Books.
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