APA (7th ed.) Citation

Heinlein, R. A. (1975). Orphans of the sky. Panther.

Chicago Style (17th ed.) Citation

Heinlein, Robert A. Orphans of the Sky. St. Albans, Hertfordshire: Panther, 1975.

MLA (8th ed.) Citation

Heinlein, Robert A. Orphans of the Sky. Panther, 1975.