Cita APA

Harrity, R. A., & Martin , R. G. (1962). Three lives Helen Keller.

Chicago Edition Citation

Harrity, Richard And, i Ralph G. Martin. Three Lives Helen Keller. 1962.

Cita MLA

Harrity, Richard And, i Ralph G. Martin. Three Lives Helen Keller. 1962.

Atenció: Aquestes cites poden no estar 100% correctes.