APA (7th ed.) Citation

Heinlein, R. A. (1975). Beyond this horizon. New American Library.

Chicago Style (17th ed.) Citation

Heinlein, Robert A. Beyond This Horizon. New York: New American Library, 1975.

MLA (9th ed.) Citation

Heinlein, Robert A. Beyond This Horizon. New American Library, 1975.

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