Cita APA

Asimov, I. (1987). Foundation and earth. Grafton Books.

Chicago Style (17th ed.) Citation

Asimov, Isaac. Foundation and Earth. Grafton Books, 1987.

Cita MLA

Asimov, Isaac. Foundation and Earth. Grafton Books, 1987.

Atenció: Aquestes cites poden no estar 100% correctes.