APA (7th ed.) Citation

Heinlein, R. A. (1990). Friday (12th impr.). New English Library.

Chicago Style (17th ed.) Citation

Heinlein, Robert A. Friday. 12th impr. London: New English Library, 1990.

MLA (9th ed.) Citation

Heinlein, Robert A. Friday. 12th impr. New English Library, 1990.

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