Cita APA (7a ed.)
Calhoun, D. 1988 Yearbook of Science and the Future. Encyclopaedia Britannica.
Cita estilo Chicago (17a ed.)
Calhoun, David. 1988 Yearbook of Science and the Future. Chicago, EUA: Encyclopaedia Britannica.
Cita MLA (9a ed.)
Calhoun, David. 1988 Yearbook of Science and the Future. Encyclopaedia Britannica.
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