Cita APA (7a ed.)
Russell, E. F., & Williams, R. M. Three to Conquer. Ace Books.
Cita estilo Chicago (17a ed.)
Russell, Eric Frank, y Robert Moore Williams. Three to Conquer. Nueva York, EUA: Ace Books.
Cita MLA (9a ed.)
Russell, Eric Frank, y Robert Moore Williams. Three to Conquer. Ace Books.
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