APA (7th ed.) Citation

Asimov, I. (1953). Second foundation ([Book Club ed.].). Gnome Press.

Chicago Style (17th ed.) Citation

Asimov, Isaac. Second Foundation. [Book Club ed.]. [New York]: Gnome Press, 1953.

MLA (9th ed.) Citation

Asimov, Isaac. Second Foundation. [Book Club ed.]. Gnome Press, 1953.