Cita APA (7a ed.)
Wollheim, D. A., & Wright, L. (1957). The Earth in Peril. Ace Books.
Cita estilo Chicago (17a ed.)
Wollheim, Donald A., y Lan Wright. The Earth in Peril. Nueva York, EUA: Ace Books, 1957.
Cita MLA (9a ed.)
Wollheim, Donald A., y Lan Wright. The Earth in Peril. Ace Books, 1957.
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