APA (7th ed.) Citation

al.], I. A., & Knight, c. D. (1979). O sorriso de metal. Portugal Press.

Chicago Style (17th ed.) Citation

al.], Isaac Asimov...[et, and coord. Damon Knight. O Sorriso De Metal. Portugal Press, 1979.

MLA (8th ed.) Citation

al.], Isaac Asimov...[et, and coord. Damon Knight. O Sorriso De Metal. Portugal Press, 1979.

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