APA (7th ed.) Citation

Heller, D., & Heller, D. (1963). The Berlin Wall (2. print.). Walker.

Chicago Style (17th ed.) Citation

Heller, Deane, and David Heller. The Berlin Wall. 2. print. New York: Walker, 1963.

MLA (9th ed.) Citation

Heller, Deane, and David Heller. The Berlin Wall. 2. print. Walker, 1963.