APA (7th ed.) Citation

Lem, S. (1973). The invincible. Ace.

Chicago Style (17th ed.) Citation

Lem, Stanisław. The Invincible. New York: Ace, 1973.

MLA (9th ed.) Citation

Lem, Stanisław. The Invincible. Ace, 1973.

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