APA (7th ed.) Citation

Questar, Inc, Hearst Entertainment (Firm), Keller, H., Sullivan, A., & Kaltenborn, H. v. (1991). Helen Keller.

Chicago Style (17th ed.) Citation

Questar, Inc, Hearst Entertainment (Firm), Helen Keller, Annie Sullivan, and H. v. Kaltenborn. Helen Keller. 1991.

MLA (9th ed.) Citation

Questar, Inc, et al. Helen Keller. 1991.