APA (7th ed.) Citation

Asimov, I. (1961). The wellsprings of life. A Mentor BooK.

Chicago Style (17th ed.) Citation

Asimov, Isaac. The Wellsprings of Life. New York: A Mentor BooK, 1961.

MLA (8th ed.) Citation

Asimov, Isaac. The Wellsprings of Life. A Mentor BooK, 1961.

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