APA (7th ed.) Citation

Heinlein, R. A. (1966). The worlds of Robert A. Heinlein. Ace Publishing Corp.

Chicago Style (17th ed.) Citation

Heinlein, Robert A. The Worlds of Robert A. Heinlein. New York: Ace Publishing Corp, 1966.

MLA (9th ed.) Citation

Heinlein, Robert A. The Worlds of Robert A. Heinlein. Ace Publishing Corp, 1966.