APA (7th ed.) Citation

Hellman, G. T., & Chappell, W. (1952). AAK: A profile. [publisher not identified].

Chicago Style (17th ed.) Citation

Hellman, Geoffrey T., and Warren Chappell. AAK: A Profile. [New York]: [publisher not identified], 1952.

MLA (9th ed.) Citation

Hellman, Geoffrey T., and Warren Chappell. AAK: A Profile. [publisher not identified], 1952.