APA

Rhodan P., . (1977). Duel under the double sun. New York: Ace Books.

Chicago

Rhodan Perry, . 1977. Duel under the double sun. New York: Ace Books.

Harvard

Rhodan P., . (1977). Duel under the double sun. New York: Ace Books.

MLA

Rhodan Perry, . Duel under the double sun. New York: Ace Books. 1977.