APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.