APA (7th ed.) Citation

Koestler, A., & Harris, H. A. (1976). Astride the two cultures: Arthur Koestler at 70 (1st American ed.). Random House.

Chicago Style (17th ed.) Citation

Koestler, Arthur, and Harold Arthur Harris. Astride the Two Cultures: Arthur Koestler at 70. 1st American ed. New York: Random House, 1976.

MLA (9th ed.) Citation

Koestler, Arthur, and Harold Arthur Harris. Astride the Two Cultures: Arthur Koestler at 70. 1st American ed. Random House, 1976.