Foundation: Foundation and Empire; Second Foundation

MLA

Asimov, Isaac, and Michael Dirda. Foundation: Foundation and Empire; Second Foundation. New York, NY: Everyman's Library, 2010.

APA

Asimov, I., & Dirda, M. (2010). Foundation: Foundation and Empire; Second Foundation. New York, NY: Everyman's Library.

Chicago

Asimov, Isaac, and Michael Dirda. Foundation: Foundation and Empire; Second Foundation. New York, NY: Everyman's Library, 2010.