Cita APA

Asimov, I. (1953). The Foundation Trilogy: Three Classics of Science Fiction. New York US: Foundation; Foundation and Empire; Second Foundation.

Citación estilo Chicago

Asimov, Isaac. The Foundation Trilogy: Three Classics of Science Fiction. New York US: Foundation; Foundation and Empire; Second Foundation, 1953.

Cita MLA

Asimov, Isaac. The Foundation Trilogy: Three Classics of Science Fiction. New York US: Foundation; Foundation and Empire; Second Foundation, 1953.