APA (7th ed.) Citation

Asimov, I. (1967). Realm of numbers. Fawcett.

Chicago Style (17th ed.) Citation

Asimov, Isaac. Realm of Numbers. Greenwich, Conn.: Fawcett, 1967.

MLA (9th ed.) Citation

Asimov, Isaac. Realm of Numbers. Fawcett, 1967.

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